bsc+sts+user+formulas+r9_rev_b

BSC STS USER-FORMULAS

ERICSSON GSM SYSTEM R9.1

Abstract

This document defines a number of BSC user-formulas. The user-formulas are based on STS counters in the BSC object types.

By applying the user-formulas to collected STS statistics the network performance can be evaluated. The user-formulas can also be a useful tool in network optimisation activities.

Rev B 2003-08-28 1(96)

© Ericsson. Limited Internal

BSC STS USER-FORMULAS, ERICSSON GSM SYSTEM R9.1

CONTENTS

1 INTRODUCTION..................................................................................................4

1.1 USER-DEFINED SUMMATION COUNTERS........................................................61.2 MAIN DIFFERENCES FROM R8........................................................................8

2 STATISTICS ON BSC LEVEL..........................................................................11

3 RANDOM ACCESS CHANNEL STATISTICS...............................................12

4 IMMEDIATE ASSIGNMENT STATISTICS...................................................14

5 SDCCH STATISTICS.........................................................................................15

5.1 ORDINARY CELL STRUCTURE......................................................................155.2 OL/UL SUBCELL STRUCTURE......................................................................19

6 TCH STATISTICS..............................................................................................26

6.1 ORDINARY CELL STRUCTURE......................................................................286.2 OL/UL SUBCELL STRUCTURE......................................................................36

7 HANDOVER STATISTICS................................................................................51

7.1 INTRA-CELL HANDOVER..............................................................................517.2 SUBCELL CHANGE........................................................................................527.3 INTER CELL HANDOVER, CELL LEVEL........................................................547.4 INTER CELL HANDOVER, CELL RELATION LEVEL.......................................59

8 HANDOVER ON SDCCH..................................................................................66

9 GSM POSITIONING..........................................................................................66

9.1 BSC FORMULAS...........................................................................................669.2 CELL FORMULAS.........................................................................................67

10 IDLE CHANNEL STATISTICS......................................................................67

10.1 IDLE CHANNEL..............................................................................................67

11 GPRS/EGPRS STATISTICS............................................................................69

11.1 BSC LEVEL..................................................................................................6911.2 CELL LEVEL.................................................................................................7211.3 CELL LEVEL GPRS/EGPRS TRAFFIC LOAD, RADIO LINK BITRATE AND

QUALITY OF SERVICE...................................................................................7611.4 PCU PROCESSOR USAGE (RPP)...................................................................87

12 MULTISLOT CONNECTIONS PER BSC.....................................................89

13 TRANSCODER STATISTICS.........................................................................90

14 CONNECTION RELATED STATISTICS.....................................................92

14.1 SUCCESSFUL TERMINATION.........................................................................9214.2 DROPPED CONNECTIONS ON TIME SLOT BASIS............................................93

15 ABIS....................................................................................................................93

16 ATER..................................................................................................................94

17 REFERENCES...................................................................................................96

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18 REVISION HISTORY......................................................................................97

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1 IntroductionThe user-formulas are based on STS counters from object types in the BSC. In addition to the STS counters, some user-defined summation counters are also used in the user-formulas (see Chapter 1.1). These user-defined summation counters are calculated as a sum of STS counters from the object types in the BSC.

The general BSC statistics are based on STS counters from the object type LOADREG, LOAS, LOASMISC and BSC.

The counters used in the formulas describing the random access performance can be found in the object types RANDOMACC, RNDACCEXT and CELLGPRS.

The formulas for SDCCH performance are based on counters from the object types CLSDCCH, CLSDCCHO, CELLCCHDR , CELLCONF and CCCHLOAD

The formulas describing the TCH performance are based on counters from the object types CLTCH, CELTCHF, CELTCHH, CLTCHFV1, CLTCHFV2, CLTCHDRF, CLTCHDRH, IDLEOTCHF, IDLEOTCHH, IDLEUTCHF, IDLEUTCHH and DOWNTIME. No distinction between half rate or full rate have been done. Instead the speech version are denoted with “x” in the formulas. Formulas related to dualband MSs can be found in the object type CELLDUALT and formulas related to Speech Quality Supervision can be found in the object type CELLSQI.

User-formulas concerning Transcoder statistics are composed of counters from the objet types TRAPCOM, TRAPEVENT, TRASEVENT, TRASUBPOOL and MOTG.

User-formulas related to intra-cell handover, handover between underlaid and overlaid cells, registration of HCS measurement and load sharing handover are based on counters from the object types CELEVENTI, CELEVENTS, CELLHCS and CELEVENTH. Counters related to inter-cell handover can be found in the object types NCELLREL, NECELLREL, NICELASS, NECELASS, NICELHO, NECELHO, NICELHOEX and NECELHOEX. Handovers on SDCCH can be found in the object type CELLCCHHO. Some new counters for handover in relation to UTRAN cells could be found in object type NUCELLREL

Counters related to subscriber terminated connections can be found in the object types CELEVENTD. Formulas for dropped connections on time slot basis are composed of counters from the object type MOTS.

User-formulas concerning the Abis and Ater interface are composed of counters from the LAPD, ATERTRANS and DIGPATH object types.

User formulas related to multislot connections per BSC are handled by the object type BSCMSLOT.

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User formulas related to GPRS can be found in a number of new and changed object types. GPRS on BSC level could be found in BSCGPRS and BSCQOS. GPRS on Cell level could be found in CELLGPRS, TRAFFGPRS, CELLQOSG, CELLQOSEG and RLINKBITR.

User-Formula related to

STS Object Types from previous release

Object Types added or changed in R9.0

Object Types added or changed in R9.1

BSC LOAS, BSC, LOADREG

BSCPOS(A), LOASMISC(A), LOADREG(C), LOAS(C),

BSC(C),

Random Access RANDOMACC, RNDACCEXT, CELLGPRS

Immediate Assignment

CCCHLOAD

SDCCH CLSDCCH, CLSDCCHO, CELLCCHDR, CELLCCHHOCELLCONF

TCH CLTCH, CELTCHF, CELTCHH, CLTCHFV1, CLTCHFV2, CLTCHDRF, CLTCHDRH,DOWNTIME, CELLSQI,CELLDUALT

CELLDUALT(C),

Handover CELEVENTH, CELEVENTS, CELEVENTI, CELLHCS,NCELLREL, NECELLREL, NICELASS, NECELASS, NICELHO, NICELHOEXNECELHO,

NUCELLREL(A), CELEVENTS(C),

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NECELHOEX

Handover on SDCCH

CELLCCHHO

GSM positioning CELLPOS

Idle Channel IDLEOTCHF, IDLEOTCHH,IDLEUTCHF, IDLEUTCHH

GPRS/EGPRS BSCGPRS, CELLGPRS, EMGPRS

TRAFFGPRS(A), CELLQOSG(A), CELLQOSEG(A), RLINKBITR(A), BSCQOS(A), BSCGPRS(C), CELLGPRS(C),

Multislot Connections

BSCMSLOT

Transcoder TRAPCOM, TRAPEVENT,TRASEVENT, MOTG

TRASUBPOOL(A),

Connection MOTS, CELEVENTD

CELEVENTD(C),

Abis LAPD

Ater ATERTRANS

Table 1. Relationship between counters used in user-formulas and STS object types.

In the Table 1 above, the changes of Object types in R9.0 and R9.1 is shown. Added OT are marked with (A) and changed OT are marked with (C)

1.1 User-Defined Summation countersIn addition to the BSC STS counters, the following summation counters are used.

PERLEN Measurement period length in minutes used in STS

The following summation counters are calculated for every cell in the BSC as the sum over all internal cell relations.

SUMIHODEC Sum of Handover Decisions (Incoming Handover)

SUMIHOATT Sum of Handover Attempts (Incoming Handover)

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SUMIHOREV Sum of MS Reversions (Incoming Handover)

SUMIHOLOST Sum of MS Lost (Incoming Handover)

SUMIHOSUCC Sum of Successful Handovers (Incoming Handover)

SUMIABSUCC Sum of Successful Assignment Handovers to Better Cell (Incoming Handover)

SUMIAWSUCC Sum of Successful Assignment Handovers to Worse Cell (Incoming Handover)

SUMOHODEC Sum of Handover Decisions (Outgoing Handover)

SUMOHOATT Sum of Handover Attempts (Outgoing Handover)

SUMOHOREV Sum of MS Reversions (Outgoing Handover)

SUMOHOLOST Sum of MS Lost (Outgoing Handover)

SUMOHOSUCC Sum of Successful Handovers (Outgoing Handover)

SUMOABSUCC Sum of Successful Assignment Handovers to Better Cell (Outgoing Handover)

SUMOAWSUCC Sum of Successful Assignment Handovers to Worse Cell (Outgoing Handover)

The following summation counters are calculated for every cell in the BSC as the sum over all external cell relations.

SUMEOHDEC Sum of Handover Decisions (Outgoing Handover)

SUMEOHATT Sum of Handover Attempts (Outgoing Handover)

SUMEOHREV Sum of MS Reversions (Outgoing Handover)

SUMEOHLOST Sum of MS Lost (Outgoing Handover)

SUMEOHSUCC Sum of Successful Handovers (Outgoing Handover)

The STS object types that contain counters for internal cell relations are NCELLREL, NICELASS, NICELHOEX and NICELHO and for external relations NECELLREL, NECELASS, NECELHOEX and NECELHO. The following formulas show how the summation counters above are calculated for every cell in the BSC as the sum of all internal or external cell relations.

Ericsson1 only DEC = HOTOKCL +HOTOLCL + HODWNQA + HOUPLQA + HOEXCTA + HOASWCL

Ericsson3 only DEC = HOATTHSS + HOATTLSS + HODWNQA + HOUPLQA + HOEXCTA + HOASWCL

Ericsson1 & 3 ATT = HOVERCNT

REV = HORTTOCH

LOST = HOVERCNT - HORTTOCH - HOVERSUC

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SUCC = HOVERSUC

ABSUCC = HOSUCBCL

AWSUCC = HOSUCWCL

1.2 Main differences from R8

Formulas for GPRS are further developed.

Formulas for EGPRS are introduced.

Counters HOATTULMAXIHO, HOSUCULMAXIHO, HOATTOLMAXIHO, HOSUCOLMAXIHO in the object type CELLEVENTS and related formuls are introduced.

Counters HOATTULBQ and HOSUCULBQ in the object type CELLEVENTS and related formauls are removed.

Formulas for load on Common Control Channel in the object type CCCHLOAD are introduced.

Formulas related to the feature BSS positioning in the object types BSCPOS and CELLPOS are introduced.

Formulas related to GSM to UTRAN handovers in the object type NUCELLREL are introduced.

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New formulas:

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LU_FETCH C_IMAS_REJ P_IMAS_REJ

HU_SUC HU_RETURN HU_LOST

TRASUB_AVL TRASUB_ACT TRASUB_IDL

H_OLUL_MAXIO H_ULOL_MAXIO H_UL_MAXIH_SUC

H_UL_MAXIH_SUC POS_SM_RES POS_SM_SUC

POS_SM_ABR POS_MS_SUC GQ_DA_BSC

GQ_UA_BSC EQ_DA_BSC EQ_UA_BSC

BQOS_G_PFCD BQOS_G_PFCU BQOS_E_PFCD

BQOS_E_PFCU PRE_TBFM PRE_PDCHM

CELL_MOVED MOVE_CELL_TBM G_TBF_UL

G_TBF_DL G_TBF_BL G_TBFP_UL

G_TBFP_DL G_PDCH_UL G_PDCH_DL

G_PDCH_TBF_DL G_PDCH_TBF_UL EG_PDCH_TBF_DL

EG_PDCH_TBF_UL EG_TBF_UL EG_TBF_DL

EG_TBF_BL EG_TBFP_UL EG_TBFP_DL

EG_PDCH_UL EG_PDCH_DL RA_PS_SUC

RA_CS_SUC EPS_BLR_UL G_BITR_AV

G_BITR_8 G_BITR_10 G_BITR_12

G_BITR_14 G_BITR_16 G_BITR_18

G_BR_BDCS2 G_BR_BUCS2 E_BITR_AV

E_BITR_10 E_BITR_15 E_BITR_20



E_BITR_55 GQ_TP_UTZ GQ_TP_DTZ

GQ_TP_UBG GQ_TP_DBG GQ_DA_UTZ

GQ_DA_DTZ GQ_DA_UBG GQ_DA_DBG

EGQ_TP_UTZ EGQ_TP_DTZ EGQ_TP_UBG

EGQ_TP_DBG EGQ_DA_UTZ EGQ_DA_DTZ

EGQ_DA_UBG EGQ_DA_DBG GQ_DA_CELL

GQ_UA_CELL EGQ_DA_CELL EGQ_UA_CELL

S_DR_NTC_CLM S_DR_NTC_ERL

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Removed formulas:

H_BQOU_SUC H_BQOU_R

Changed formulas:

LOAD_REJ OFF_FETCH OFF_ORG

TD_TRAF RA_TOT RA_FAIL

PS_RPLOAD

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2 Statistics on BSC LevelOBJECT TYPES: LOAS, BSC, LOADREG, LOASMISC

CP_LOAD: CP Load on Average

[%]

LOAD_REJ: Number of rejected normal originating calls and emergency calls due to load regulation.

OFF_FETCH: Calls Fetched from Load Supervision Function of Total Number of Calls Offered (originating emergency calls not included)

[%]

OFF_ORG: Originating Calls Offered to the Load Supervision Function of Total Number of Calls Offered (originating emergency calls not included)

[%]

LU_FETCH: Location Updates Fetched from Load Supervision Function of Total Number of Location Update Offered.

[%]

PAG_FAIL: Number of Discarded Paging Messages due to Paging Congestion of all Paging Messages Received from the MSC

[%]

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3 Random Access Channel StatisticsIf a counter in object type RNDACCEXT is stepped, no counter in RANDOMACC will be stepped and vice versa, except for CNROCNT in RANDOMACC which always will be stepped at an accepted CS random access. The stepping of Random Access Counters are highly dependent on setting of the parameter NECI.

OBJECT TYPES: RANDOMACC, RNDACCEXT and CELLGPRS

RA_TOT: Total Number of Random Access Attempts

RA_FAIL: Failed Random Accesses of Total Number of Random Access Attempts

[%]

RA_CS_SUC: Percentage Speech Random Accesses of Total Number of Successful Random Access Attempts

[%]

RA_PS_SUC: Percentage Packet Random Accesses of Total Number of Successful Random Access Attempts

[%]

RA_LOA_REJ Rejected Random Accesses due to load regulation of Total Number of Accepted CS Random Accesses

[%]

RA_ANSWPAG: Random Accesses with Cause “Answer to Paging” of Total Number of Accepted Random Accesses

[%]

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RA_SERVICE: Mobile Originated Random Accesses (i.e. Random accesses caused by the MS user) of Total Number of Accepted Random Accesses

[%]

RA_OTHER: Random Accesses with Cause “All Other Cases”, e. g. Location Updating, Detach, Attach, etc. of Total Number of Accepted Random Accesses

[%]

RA_EMERG: Random Accesses with Cause “Emergency Calls” of Total Number of Accepted Random Accesses

[%]

RA_CALLREE: Random Accesses with Cause “Call Reestablishments”of Total Number of Accepted Random Accesses

[%]

4 Immediate Assignment StatisticsOBJECT TYPE: CCCHLOAD

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CSIMMASS: Number of CS immediate assignment messages sent on CCCH.

PSIMMASS: Number of PS IMMEDIATE ASSIGNMENT messages sent on CCCH.

C_IMAS_REJ: Rejected number of CS Immediate Assignmnets sent on CCCH of Total number of CS Immediate Assignments sent on CCCH.

[%]

P_IMAS_REJ: Rejected number of PS Immediate Assignmnets sent on CCCH of Total number of PS Immediate Assignments sent on CCCH.

[%]

Note: Counter PSIMMASS is stepped twice for a segmented Immediate Assignment. Counter REJIMMASS can only be stepped for an UL TBF setup, that is after an Channel Request.

5 SDCCH StatisticsIf no overlaid subcell structure exist chapter 5.1 should be used for evaluation of the performance.

If the cells are structured in underlaid and overlaid subcells the formulas in 5.2 should be used instead.

Remark 5.1. Please note that the counters CNUCHCNT and CNUCHSUB may show incorrect values if the Basic Physical Channel (BPC) configuration, for SDCCH channels, in the BSC differs from the actual hardware configuration in the BTSs.If the feature “Adaptive configuration of logical channels” is active the formula S_AVAIL has no meaning. Then S_AV_NR is recommended to be used instead. When using adaptive configuration of logical channels the counters CNUCHCNT, TNUCHCNT, CNUCHSUB and TNUCHSUB are not updated when a BPC supporting SDCCHs is reconfigured to a BPC supporting TCH or vice versa.

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However for the counters CAVAACC, TAVAACC, CAVASUB and TAVASUB the opposite is true. That is, these counters are updated every time an SDCCH is reconfigured to a TCH and vice versa.

5.1 Ordinary Cell Structure

5.1.1 General SDCCH

OBJECT TYPES: CLSDCCH, RANDOMACC, CCCHLOAD

S_ATT_RA: SDCCH Seizure Attempts of Total Number of Accepted Random Accesses

[%]

S_TRAF: Average SDCCH Traffic Level

[E]

S_CONG: SDCCH Congestion of Total Number of SDCCH Seizure Attempts

[%]

S_CNGT: SDCCH Time Congestion of Total Measurement Interval

[%]

S_EST: Number of SDCCH Establishments of Total Number of SDCCH Seizure Attempts when No SDCCH Congestion

[%]

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S_MHT: SDCCH Mean Holding Time

[s]

S_AV_NR: Average Number of Available SDCCHs

S_AVAIL: Available SDCCHs of Total Number of Defined SDCCHs

[%]

Note: See Remark 5.1 on page 14.

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5.1.2 Drop SDCCH

OBJECT TYPES: CELLCCHDR, CLSDCCH, CELLCCHHO

S_DR-C: Dropped SDCCH Connections of Total Number of SDCCH Connections

[%]

S_DR-C_NTC: Dropped SDCCH Connections of Total Number of SDCCH Connections without TCH Congestion.

[%]

S_DR_CLM: Call Minutes per Dropped SDCCH Connection

[min]

Note:Call Minutes per drop is the average time a call can last before it is dropped.

S_DR_ERL: Number of Dropped SDCCH Connections per Erlang

S_DR_NTC_CLM: Call Minutes per Dropped SDCCH Connection excluding SDCCH drops due to TCH congestion.

[min]


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S_DR_NTC_ERL: Number of Dropped SDCCH Connections per Erlang excluding SDCCH drops due to TCH congestion.

S_DR_SS: Dropped SDCCH Connections due to Low Signal Strength of Total Number of Dropped SDCCH Connections

[%]

S_DR_BQ: Dropped SDCCH Connections due to Bad Quality of Total Number of Dropped SDCCH Connections

[%]

S_DR_TA: Dropped SDCCH Connections due to Excessive Timing Advance of Total Number of Dropped SDCCH Connections

[%]

S_DR_OTH: Dropped SDCCH Connections due to Other Reasons than Low Signal Strength, Bad Quality or Excessive Timing Advance of Total Number of Dropped SDCCH Connections

[%]

S_DR_HO: Lost Handovers of Total Number of Dropped SDCCH connections

[%]

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5.1.3 Cell configuration on SDCCH

OBJECT TYPE: CELLCONF

CO_ATT_T2C: Number of reconfiguration Attempts from TCH to SDCCH per hour

CO_ATT_C2T: Number of reconfiguration Attempts from SDCCH to TCH per hour

5.2 OL/UL Subcell Structure

5.2.1 General SDCCH OL/UL Subcell

OBJECT TYPES: CLSDCCH, CLSDCCHO, RANDOMACC

S_AT_RA_OU: SDCCH Seizure Attempts of Total Number of Accepted Random Accesses in Overlaid and Underlaid Subcells

[%]

S_TRAF_OU: Average SDCCH Traffic Level in Overlaid and Underlaid Subcells

[E]

S_CONG_OU: SDCCH Congestion of Total Number of SDCCH Seizure Attempts in Overlaid and Underlaid Subcells

[%]

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S_EST_OU: Number of SDCCH Establishments of Total Number of SDCCH Seizure Attempts in Overlaid and Underlaid Subcells when No SDCCH Congestion

[%]

S_MHT_OU: SDCCH Mean Holding Time in Overlaid and Underlaid Subcells

[s]

S_AV_NR_OU: Average Number of Available SDCCHs in Overlaid and Underlaid Subcells

S_AVAIL_OU: Available SDCCHs of Total Number of Defined SDCCHs in Overlaid and Underlaid Subcells

[%]


5.2.2 Drop SDCCH OL/UL Subcell

OBJECT TYPES: CELLCCHDR, CLSDCCH,CELLCCHHO

S_DR-C_OU: Dropped SDCCH Connections of Total Number of SDCCH Connections in OL/UL subcell

[%]

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S_DRCNTCOU: Dropped SDCCH Connections of Total Number of SDCCH Connections without TCH Congestion in OL/UL subcell

[%]

S_DR_CLMOU: Call Minutes per Dropped SDCCH Connection in OL/UL subcell

[min]


S_DR_ERLOU: Number of Dropped SDCCH Connections per Erlang in OL/UL subcell

S_DR_NTC_CLMOU:Call Minutes per Dropped SDCCH Connection excluding SDCCH drops due to TCH congestion.

[min]


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S_DR_NTC_EROUL:Number of Dropped SDCCH Connections per Erlang excluding SDCCH drops due to TCH congestion.

S_DR_SS_OU: Dropped SDCCH Connections due to Low Signal Strength of Total Number of Dropped SDCCH Connections in OL/UL subcell

[%]

S_DR_BQ_OU: Dropped SDCCH Connections due to Bad Quality of Total Number of Dropped SDCCH Connections in OL/UL subcell

[%]

S_DR_TA_OU: Dropped SDCCH Connections due to Excessive Timing Advance of Total Number of Dropped SDCCH Connections in OL/UL subcell

[%]

S_DR_OTHOU: Dropped SDCCH Connections due to Other Reasons than Low Signal Strength, Bad Quality or Excessive Timing Advance of Total Number of Dropped SDCCH Connections in OL/UL subcell

[%]

S_DR_HO_OU: Lost Handovers of Total Number of Dropped SDCCH connections in OL/UL subcell

[%]

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5.2.3 General SDCCH UL Subcell

OBJECT TYPES: CLSDCCH, CLSDCCHO

S_TRAF_U: Average SDCCH Traffic Level in Underlaid Subcell

[E]

S_EST_U: Number of SDCCH Establishments in Underlaid Subcell of Total Number of SDCCH Seizure Attempts in Underlaid Subcell when No SDCCH Congestion

[%]

S_CONG_U: SDCCH Congestion in Underlaid Subcell of Total Number of SDCCH Seizure Attempts in Underlaid Subcell

[%]

S_CNGT_U: SDCCH Time Congestion in Underlaid Subcell of Total Measurement Interval

[%]

S_MHT_U: SDCCH Mean Holding Time in Underlaid Subcell

[s]

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S_AV_NR_U: Average Number of Available SDCCHs in Underlaid Subcell

S_AVAIL_U: Available SDCCHs in Underlaid Subcell of Total Number of Defined SDCCHs in Underlaid Subcell

[%]


5.2.4 Drop SDCCH UL Subcell

OBJECT TYPES: CELLCCHDR, CLSDCCH

S_DR_SS_U: Dropped SDCCH Connections due to Low Signal Strength in Underlaid subcell of Total Number of Dropped SDCCH Connections

[%]

S_DR_BQ_U: Dropped SDCCH Connections due to Bad Quality in Underlaid subcell of Total Number of Dropped SDCCH Connections

[%]

5.2.5 General SDCCH OL Subcell

OBJECT TYPE: CLSDCCHO

S_TRAF_O: Average SDCCH Traffic Level in Overlaid Subcell

[E]

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S_EST_O: Number of SDCCH Establishments in Overlaid Subcell of Total Number of SDCCH Seizure Attempts in Overlaid Subcell when No SDCCH Congestion

[%]

S_CONG_O: SDCCH Congestion in Overlaid Subcell

[%]

S_CNGT_O: SDCCH Time Congestion in Overlaid Subcell of Total Measurement Interval

[%]

S_MHT_O: SDCCH Mean Holding Time in Overlaid Subcell

[s]

S_AV_NR_O: Average Number of Available SDCCHs in Overlaid Subcell

S_AVAIL_O: Available SDCCHs in Overlaid Subcell of Total Number of Defined SDCCHs in Overlaid Subcell

[%]


5.2.6 Drop SDCCH OL Subcell

OBJECT TYPES: CELLCCHDR, CLSDCCHO

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S_DR_SS_O: Dropped SDCCH Connections due to Low Signal Strength in Overlaid subcell of Total Number of Dropped SDCCH Connections

[%]

S_DR_BQ_O: Dropped SDCCH Connections due to Bad Quality in Overlaid subcell of Total Number of Dropped SDCCH Connections

[%]

6 TCH StatisticsIf no overlaid subcells exist chapter 6.1 should be used for evaluation of the performance.

If the cells are structured in underlaid and overlaid subcells the formulas in 6.2 should be used to evaluate the performance.

No distinction between half rate or full rate have been done, except for dual band specific counters which includes FR/HR and TCH hard time congestion which is for FR only. Instead the speech version is denoted with “x” in the formulas.

It should be noted that more and more operators has start using both FR and HR.

When a network consists of FR/HR and formulas should be used for FR or HR only, one restriction apply. Formulas ( ) including an “x” counter (TxCASSALL) and a counter without an “x” (TASSALL) can not be used. Note that PERLEN is not a counter.

When the formulas including an “x” counter should be used for FR and HR together the following rules apply:

For formulas including an accumulation counter and a scan counter only, the FR and HR formula should be added separately see Example 1. OL/UL subcells should be calculated in the same way.

Formulas not including an accumulation and a scan counter shall be calculated by adding the counters inside the formula, see Example 2. OL/UL subcells should be calculated in the same way.

Formulas including an accumulation, a scan counter and other counters should be calculated as a combination of Example 1and Example 2, see Example 3. OL/UL subcells should be calculated in the same way.

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Example 1 Traffic Formula

Example 2 Formulas, traffic not included.

Example 3 Formulas, traffic included

Remark 6.2. The number of defined channels can be system defined or operator defined. This is set on a per cell or channel group basis.

System defined means that the number of defined TCH channels is calculated as 8 * (number of frequencies in the cell/channel group) minus the number of BPCs used for BCCH and SDCCH in the cell/channel group.

Operator defined means that the number of defined TCH channels is calculated as the required number of BPCs defined by command for the cell/channel group minus the number of BPCs used for BCCH and SDCCH in the cell/channel group. The operator defines the number of channels via the parameter NUMREQBPC.

A BPC can be configured for two different TCH channel combinations:

TCH/F ( Full Rate ):

TCH Dual Rate: One Full Rate TCH per BPC and two Half Rate TCHs per BPC are obtained but if the TCH is allocated for Full Rate, the two Half Rate TCHs are locked and cannot be allocated. Similarly, if one or two Half Rate TCHs are allocated, the Full Rate TCH is locked and cannot be allocated.

As a result, the number of system defined TCHs in a cell or a channel group is equal to the sum of the number of BPCs configured for Full Rate and the number of BPCs configured for Dual Rate TCHs.

The counters TNUCHCNT and TNUCHSUB may also show incorrect values if the BPC configuration, for TCH channels, in the BSC differs from the actual hardware configuration in the BTSs.

For example, if synthesizer hopping is used and the number of channels are system defined, TNUCHCNT and TNUCHSUB counts the number of frequencies, used for syntheziser hopping, times eight minus the BPCs used for BCCH and SDCCH in the cell/channel group, whereas the real number of used BPCs is a smaller value.

When using adaptive configuration of logical channels the counters CNUCHCNT, TNUCHCNT, CNUCHCNT and TNUCHSUB are not updated

28(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


when a BPC supporting SDCCHs is reconfigurated to a BPC supporting TCH or vice versa.

Hence, formulas including TNUCHCNT and TNUCHSUB should be handled with care.

6.1 Ordinary Cell Structure

6.1.1 General TCH

OBJECT TYPES: CLTCH, CELTCHF, CELTCHH, DOWNTIME, CLSDCCH, NICELHO, NICELHOEX

T_TRAF: Average TCH Traffic Level

[E]

T_TRAFCH: Average TCH Traffic per defined TCH Channel

[E/TCH channel]


T_TRAF_OFF: Offered TCH Traffic

[E]

T_TRAF_F: Average TCH/F Traffic Level Compared to Average TCH Traffic Level

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 29(96)



T_TRAF_H: Average TCH/H Traffic Level Compared to Average TCH Traffic Level

[%]

T_CONG: Number of dropped calls due to TCH Congestion or transcoder Congestion of Total Number of TCH assignment attempts

[%]

T_CONGT_F: TCH/F Time Congestion of Total Measurement Interval

[%]

T_CONGT_H: TCH/H Time Congestion of Total Measurement Interval

[%]

T_HARDCNGT: TCH Hard Time Congestion of Total Measurement Interval

[%]

Note: This formula is only for FR connections.

T_CONG_HO: Congestion At Handover of Total Number of Handover Decisions

[%]

30(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_MHT: TCH Mean Holding Time

[s]

T_CMHT: TCH Call Mean Holding Time

[s]

T_AV_NR: Average Number of Available TCHs

T_AVAIL: Available TCHs of Total Number of Defined TCHs

[%]


T_AS_SUC: Successful TCH Assignments of Total Number of Assignment Attempts

[%]

T_AS_SUCNC: Successful TCH Assignments of Total Number of Assignment Attempts without TCH congestion

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 31(96)



T_DWN: Average Cell downtime for Active Cells

[%]

T_EST_IM: Number of Connections established on a TCH used for signalling at immediate assignment of Total Number of Successful Assignments

[%]

T_NAVAIL: Attempts to Allocate TCHs when no Channels of That Type were Defined of Total Call Attempts

[%]

6.1.2 Drop TCH

OBJECT TYPES: CLTCHDRF, CLTCHDRH, CELTCHF, CELTCHH, NCELLREL, NECELLREL, NICELASS

T_DR_TOT: Total Number of Dropped TCH Connections

T_DR-S: Dropped TCH Connections of Total Number of Calls Terminated in the Cell

[%]

32(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


Note: This formula gives a correct result only if the investigated cell does not have any external neighbouring cells. On the BSC level, it is not necessary to include summation counters in the formula.

T_DR_CLM: Call Minutes per Dropped TCH Connection

[min]

Note: Call Minutes per drop is the average time a call lasts before it is dropped.

T_DR_ERL: Number of Dropped TCH Connections per Erlang

T_DR_HO: Lost Handovers of Total Number of Dropped TCH Connections

[%]

T_DR_SUD: Suddenly lost Connections of Total Number of Dropped TCH Connections

[%]

T_DR_SS: Dropped TCH Connections due to Low Signal Strength on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 33(96)



T_DR_SS_DL: Dropped Connections at low Signal Strength downlink of Total Number of Dropped TCH Connections

[%]

T_DR_SS_UL: Dropped Connections at low Signal Strength uplink of Total Number of Dropped TCH Connections

[%]

T_DR_SS_BL: Dropped Connections at low Signal Strength both links of Total Number of Dropped TCH Connections

[%]

T_DR_BQ: Dropped TCH Connections due to Bad Quality on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections

[%]

T_DR_BQ_DL: Dropped Connections at Bad Quality downlink of Total Number of Dropped TCH Connections

[%]

T_DR_BQ_UL: Dropped Connections at Bad Quality uplink of Total Number of Dropped TCH Connections

[%]

34(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_DR_BQ_BL: Dropped Connections at Bad Quality both links of Total Number of Dropped TCH Connections

[%]

T_DR_TA: Dropped TCH Connections due to Excessive Timing Advance of Total Number of Dropped TCH Connections

[%]

T_DR_OTH: Dropped TCH Connections due to Other Reasons than Low Signal Strength, Bad Quality or Excessive Timing Advance of Total Number of Dropped TCH Connections

[%]

6.1.3 Dual band MS statistics

OBJECT TYPES: CELLDUALT

TD_TRAF: Average TCH Traffic Level for dual band MS

[E]

TD_AS_SUC: Successful TCH Assignments of Total Number of Assignment Attempts for dual band MS

[%]

TD_DR-S: Dropped TCH Connections of Total Number of Calls for dual band MS

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 35(96)



TD_DR_CLM: Call Minutes per Dropped TCH Connection for dual band MS

[min]

Note: Call Minutes per drop is the average time a call lasts before it is dropped.

6.1.4 Speech Quality Supervision

OBJECT TYPE: CELLSQI

T_SQI_GOOD: Number measurement with good speech quality of total measurement

[%]

T_SQI_ACC: Number measurement with acceptable speech quality of total measurement

[%]

T_SQI_BAD: Number measurement with bad speech quality of total measurement

[%]

36(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


6.2 OL/UL Subcell Structure

6.2.1 General TCH OL/UL Subcell

OBJECT TYPES: CLTCH, CELTCHF, CELTCHH, DOWNTIME, CLSDCCH, NICELHO, NICELHOEX

T_TRAF_OU: Average TCH Traffic Level in OL/UL Subcell

[E]

T_TRAFCHOU: Average TCH Traffic per defined TCH Channel in OL/UL Subcell

[E/TCH channel]


T_CONG_OU: TCH Congestion or transcoder Congestion of Total Number of TCH assignment attempts in OL/UL Subcell

[%]

T_CONGHOOU: Congestion At Handover of Total Number of Handover Decisions in OL/UL Subcell

[%]

T_MHT_OU: TCH Mean Holding Time in OL/UL Subcell

[s]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 37(96)



T_CMHT_OU: TCH Call Mean Holding Time in OL/UL Subcell

[s]

T_AV_NR_OU: Average Number of Available TCHs in OL/UL Subcell

T_AVAIL_OU: Available TCHs of Total Number of Defined TCHs in OL/UL Subcell

[%]


T_AS_SUCOU: Successful TCH Assignments of Total Number of Assignment Attempts in OL/UL Subcell

[%]

T_AS_SNCOU: Successful TCH Assignments of Total Number of Assignment Attempts without TCH congestion in OL/UL Subcell

[%]

T_DWN_OU: Average Cell downtime for Active Cells in OL/UL Subcell

[%]

38(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_EST_IMOU: Number of Connections established on a TCH used for signalling at immediate assignment of Total Number of Successful Assignments in OL/UL Subcell

[%]

T_NAVAILOU: Attempts to Allocate TCHs when no Channels of That Type were Defined of Total Call Attempts in OL/UL Subcell

[%]

6.2.2 Drop TCH OL/UL Subcell

OBJECT TYPES: CLTCHDRF, CLTCHDRH, CELTCHF, CELTCHH, NCELLREL, NECELLREL, NICELASS

T_DR_TOTOU: Total Number of Dropped TCH Connections in OL/UL Subcell

T_DR-S_OU: Dropped TCH Connections of Total Number of Calls Terminated in the Cell in OL/UL Subcell

[%]

Note: This formula gives a correct result only if the investigated cell does not have any external neighbouring cells.

EAB/GRE/SNI-03:072 Rev B 2003-08-28 39(96)



T_DR_CLMOU: Call Minutes per Dropped TCH Connection in OL/UL Subcell

[min]

Note: Call Minutes per drop is the average time a call can last before it is dropped.

T_DR_ERLOU: Number of Dropped TCH Connections per Erlang in OL/UL Subcell

T_DR_HO_OU: Lost Handovers of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DR_SUDOU: Suddenly lost Connections of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DR_SS_OU: Dropped TCH Connections due to Low Signal Strength on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

40(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_DRSSDLOU: Dropped Connections at low Signal Strength downlink of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DRSSULOU: Dropped Connections at low Signal Strength uplink of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DRSSBLOU: Dropped Connections at low Signal Strength both links of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DR_BQ_OU: Dropped TCH Connections due to Bad Quality on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DRBQDLOU: Dropped Connections at Bad Quality downlink of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DRBQULOU: Dropped Connections at Bad Quality uplink of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 41(96)



T_DRBQBLOU: Dropped Connections at Bad Quality both links of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

T_DR_TA_OU: Dropped TCH Connections due to Excessive Timing Advance of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]U

T_DR_OTHOU: Dropped TCH Connections due to Other Reasons than Low Signal Strength, Bad Quality or Excessive Timing Advance of Total Number of Dropped TCH Connections in OL/UL Subcell

[%]

6.2.3 Speech Quality Supervision OL/UL Subcell


T_SQI_G_OU: Number measurement with good speech quality of total measurement in OL/UL Subcell

[%]

T_SQI_A_OU: Number measurement with acceptable speech quality of total measurement in OL/UL Subcell

[%]

42(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_SQI_BAD: Number measurement with bad speech quality of total measurement in OL/UL Subcell

[%]

6.2.4 General TCH UL Subcell

OBJECT TYPES: CLTCH, CELTCHF, CELTCHH

T_TRAF_U: Average TCH Traffic Level in Underlaid Subcell

[E]

T_TRAFCH_U: Average TCH Traffic per defined TCH Channel in Underlaid Subcell

[E/TCH channel]


T_CONGT_F_U: TCH Time Congestion in Underlaid Subcell of Total Measurement Interval

[%]

T_CONGT_H_U: TCH Time Congestion in Underlaid Subcell of Total Measurement Interval

[%]

T_HARDCGTU: TCH Hard Time Congestion in Underlaid Subcell of Total Measurement Interval

[%]


EAB/GRE/SNI-03:072 Rev B 2003-08-28 43(96)



T_MHT_U: TCH Mean Holding Time in Underlaid Subcell

[s]

T_AV_NR_U: Average Number of Available TCHs in Underlaid Subcell

T_AVAIL_U: Available TCHs in Underlaid Subcell of Total Number of Defined TCHs in Underlaid Subcell

[%]


6.2.5 Drop TCH UL Subcell

CLTCHDRF, CLTCHDRH, CELTCHF, CELTCHH

T_DR_TOTU: Total Number of Dropped TCH Connections in Underlaid Subcell

T_DR-S_U: Dropped TCH Connections of Total Number of TCH Connections in Underlaid Subcell

[%]

44(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_DR_CLMU: Call Minutes per Dropped TCH Connection in Underlaid Subcell

[min]


T_DR_ERLU: Number of Dropped TCH Connections per Erlang in Underlaid Subcell

T_DR_SUD_U: Suddenly lost Connections of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_SSU: Dropped TCH Connections due to Low Signal Strength on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_SSDLU: Dropped Connections at Low Signal Strength Downlink of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 45(96)



T_DR_SSULU: Dropped Connections at Low Signal Strength Uplink of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_SSBLU: Dropped Connections at Low Signal Strength Both links of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_BQU: Dropped TCH Connections due to Bad Quality on Uplink, Downlink or Both Links of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_BQDLU: Dropped Connections at Bad Quality Downlink of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_BQULU: Dropped Connections at Bad Quality Uplink of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

T_DR_BQBLU: Dropped Connections at Bad Quality Both links of Total Number of Dropped TCH Connections in Underlaid Subcell

[%]

46(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


6.2.6 Speech Quality Supervision UL Subcell


T_SQI_G_U: Number measurement with good speech quality of total measurement in underlaid subcell

[%]

T_SQI_A_U: Number measurement with acceptable speech quality of total measurement in underlaid subcell

[%]

T_SQI_B_U: Number measurement with bad speech quality of total measurement in underlaid subcell

[%]

6.2.7 General TCH OL Subcell

OBJECT TYPES: CLTCH, CELTCHF, CELTCHH

T_TRAF_O: Average TCH Traffic Level in Overlaid Subcell

[E]

T_TRAFCH_O: Average TCH Traffic per defined TCH Channel in Overlaid Subcell

[E/TCH channel]


EAB/GRE/SNI-03:072 Rev B 2003-08-28 47(96)



T_CNGT_F_O: TCH Time Congestion in Overlaid Subcell of Total Measurement Interval

[%]

T_CNGT_H_O: TCH Time Congestion in Overlaid Subcell of Total Measurement Interval

[%]

T_HARDCGTO: TCH Hard Time Congestion in Overlaid Subcell of Total Measurement Interval

[%]


T_MHT_O: TCH Mean Holding Time in Overlaid Subcell

[s]

T_AV_NR_O: Average Number of Available TCHs in Overlaid Subcell

T_AVAIL_O: Available TCHs of Total Number of Defined TCHs in Overlaid Subcell

[%]


48(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


6.2.8 Drop TCH OL Subcell

CLTCHDRF, CLTCHDRH, CELTCHF, CELTCHH

T_DR_TOTO: Total Number of Dropped TCH Connections in Overlaid Subcell

T_DR-S_O: Dropped TCH Connections of Total Number of TCH Connections in Overlaid Subcell

[%]

T_DR_CLMO: Call Minutes per Dropped TCH Connection in Overlaid Subcell

[min]


T_DR_ERLO: Number of Dropped TCH Connections per Erlang in Overlaid Subcell

T_DR_SUD_O: Suddenly lost Connections of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 49(96)



T_DR_SSO: Dropped TCH Connections due to Low Signal Strength on Uplink or Downlink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_SSDLO: Dropped Connections at Low Signal Strength Downlink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_SSULO: Dropped Connections at Low Signal Strength Uplink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_SSBLO: Dropped Connections at Low Signal Strength Both links of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_BQO: Dropped TCH Connections due to Bad Quality on Uplink or Downlink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

50(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


T_DR_BQDLO: Dropped Connections at Bad Quality Downlink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_BQULO: Dropped Connections at Bad Quality Uplink of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

T_DR_BQBLO: Dropped Connections at Bad Quality Both links of Total Number of Dropped TCH Connections in Overlaid Subcell

[%]

6.2.9 Speech Quality Supervision OL/UL Subcell


T_SQI_G_O: Number measurement with good speech quality of total measurement in overlaid subcell

[%]

T_SQI_A_O: Number measurement with acceptable speech quality of total measurement in overlaid subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 51(96)



T_SQI_B_O: Number measurement with bad speech quality of total measurement in overlaid subcell

[%]

7 Handover StatisticsNo distinction between half rate or full rate have been done. Instead the speech version is denoted with “x” in the formulas.

Formulas ( (HOINDQA+HOINUQA+HOINBQA)/TxMSESTB ) including an “x” counter (TxMSESTB) and a counter without an “x” (HOINDQA) can not be used for FR or HR only, if the network support both FR and HR.

7.1 Intra-Cell HandoverOBJECT TYPES: CELEVENTI, CELTCHF, CELTCHH

IHO_TOT: Total Number of Intra-Cell Handover Decisions

IHO_TOT-C: Intra-Cell Handover Decisions of Total Number of TCH Connections

[%]

IHO_SUC: Successful Intra-Cell Handovers of Total Number of Intra-Cell Handover Decisions

[%]

IHO_BACK: Unsuccessful Intra-Cell Handovers, where the MS Successfully Turned Back to Old Channel, of Total Number of Intra-Cell Handover Decisions

[%]

52(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


IHO_NPERF: Not Performed Intra-Cell Handover of Total Number of Intra-Cell Handover Decisions

[%]

Note: This formula does not give correct values at congestion.

IHO_BQ_DWN: Intra-Cell Handovers due to Bad Downlink Quality of Total Number of Intra-Cell Handover Decisions

[%]

IHO_BQ_UP: Intra-Cell Handovers due to Bad Uplink Quality of Total Number of Intra-Cell Handover Decisions

[%]

IHO_BQ_BL: Intra-Cell Handovers due to Bad Quality in Both Uplink and Downlink of Total Number of Intra-Cell Handover Decisions

[%]

7.2 Subcell ChangeOBJECT TYPE: CELEVENTS

H_ULOL_SUC: Successful Handovers from Underlaid to Overlaid Subcell of Total Number of Handover Decisions from Underlaid to Overlaid Subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 53(96)



Note: HOSUCOL and HOAATOL do not include subcell change due to reached maximum number of intracell handovers in underlaid subcell.

H_OLUL_SUC: Successful Handovers from Overlaid to Underlaid Subcell of Total Number of Handover Decisions from Overlaid to Underlaid Subcell

[%]

Note: HOSUCUL and HOAATUL do not include subcell change due to reached maximum number of intracell handovers in overlaid subcell.

H_OLUL_MAXIHO: Subcell change from Overlaid to Underlaid Subcell due to reached maximum number of intra cell handovers in Overlaid subcell of total number of Subcell change from Overlaid to Underlaid.

[%]

H_ULOL_MAXIHO: Subcell change from Underlaid to Overlaid Subcell due to reached maximum number of intra cell handovers in Underlaid subcell of total number of Subcell change from Underlaid to Overlaid.

[%]

H_UL_MAXIH_SUC: Successful Subcell change from Overlaid to Underlaid Subcell due to reached maximum number of total intra cell handovers in Overlaid subcell of total number of Subcell change from Overlaid to Underlaid Subcell due to reached maximum number of total intra cell handovers in Overlaid subcell

[%]

H_OL_MAXIH_SUC: Successful Subcell change from Underlaid to Overerlaid Subcell due to reached maximum number of total intra cell handovers in Underlaid subcell of total number of Subcell change from Underlaid to Overlaid Subcell due to reached maximum number of total intra cell handovers in Underlaid subcell

[%]

54(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


ERL_OLUL: Average TCH Traffic level per successful subcell change from Overlaid to Underlaid or from Underlaid to Overlaid

7.3 Inter Cell Handover, Cell Level

7.3.1 Handover due to Load Sharing, HCS or O&M Intervention

OBJECT TYPES: CELEVENTH, CELTCHF, CELTCHH, NCELLREL, CELLHCS

H_LS_SUC: Successful Handovers due to Cell Load Sharing of Total Number of Handover Decisions due to Cell Load Sharing

[%]

H_LS: Successful Handovers due to Cell Load Sharing of Total Number of Successful Outgoing Handovers

[%]

H_LS_TIME: Percentage of Time that Cell Load Sharing has been Active in the Cell

[%]

H_HCS_EVA: Locating Evaluations where HCS ranking Differs from Basic Ranking of total Locating Evaluations

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 55(96)



H_OM_SUC: Successful Handovers due to Operation and Maintenance Intervention of Total Number of Handover Decisions due to Operation and Maintenance Intervention

[%]

H_OM: Successful Maintenance Intervention of Total Number of Succesful Outgoing Handovers

[%]

7.3.2 Internal and External Handover Statistics

These user formulas are calculated per Cell using counters on cell relation level (internal or external). The formulas are separated into five sections; Internal Outgoing Handover, External Outgoing Handover, Internal and External Outgoing Handovers, Internal Incoming Handover and Handover flow. There are no statistics on External Incoming Handovers that can be obtained from the BSC.

OBJECT TYPES: NCELLREL, NECELLREL, CELTCHF, CELTCHH

7.3.2.1 Internal Outgoing Handover

HO_SUC: Successful Internal Outgoing Handovers of Total Number of Internal Outgoing Handover Attempts

[%]

HO_REV: MS Reversion to Old Channel at Internal Outgoing Handovers of Total Number of Internal Outgoing Handover Attempts

[%]

56(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


HO_LOST: MSs Lost at Internal Outgoing Handover of Total Number of Internal Outgoing Handover Attempts

[%]

7.3.2.2 External Outgoing Handover

HOE_SUC: Successful External Outgoing Handovers of Total Number of External Outgoing Handover Attempts

[%]

HOE_REV: MS Reversions to Old Channel at External Outgoing Handover of Total Number of External Outgoing Handover Attempts

[%]

HOE_LOST: MSs Lost at External Outgoing Handover of Total Number of External Outgoing Handover Attempts

[%]

7.3.2.3 Internal and External Outgoing Handovers

HOT_TOT: Total Number of Internal and External Outgoing Handover Attempts

HOT_SUC: Successful Internal and External Outgoing Handovers of Total Number of Internal and External Outgoing Handover Attempts

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 57(96)



HOT_REV: MS Reversions at Internal and External Outgoing Handovers of Total Number of Outgoing Internal and External Handover Attempts

[%]

HOT_LOST: MSs Lost at Internal and External Outgoing Handovers of Total Number of Internal and External Outgoing Handover Attempts

[%]

HOT_TAVER: Average Time between Outgoing Handover Attempts

[s]

7.3.2.4 Internal Incoming Handover

HI_SUC: Successful Internal Incoming Handovers of Total Number of Internal Incoming Handover Attempts

[%]

HI_REV: MS Reversions at Internal Incoming Handovers of Total Number of Internal Incoming Handover Attempts

[%]

HI_LOST: MSs Lost at Internal Incoming Handovers of Total Number of Internal Incoming Handover Attempts

[%]

58(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


7.3.2.5 Handover Flow

H_FLOW: Handover Flow, Internal Handover

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 59(96)



7.4 Inter Cell Handover, Cell Relation LevelThese user formulas are calculated per Cell Relation (internal or external).

OBJECT TYPES: NCELLREL, NECELLREL, NICELASS, NECELASS,

NICELHO, NECELHO, NICELHOEX, NECELHOEX

H_SUC: Successful Handovers of Total Number of Handover Attempts

[%]

H_REV: MS Reversions to Old Channel of Total Number of Handover Attempts

[%]

H_LOST: MSs Lost at Handover of Total Number of Handover Attempts

[%]

H_BQ_DWN-R: Handover Decisions due to Bad Downlink Quality of Total Number of Bad Quality Urgency Handover Decisions

[%]

H_BQ_UP-R: Handover Decisions due to Bad Uplink Quality of Total Number of Bad Quality Urgency Handover Decisions

[%]

60(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


H_10SEC: Successful Handover Back to Old Cell within 10 Seconds of Total Successful Handovers

[%]

HA_BE_SUC: Successful Assignment Handovers to Better Cell of Total Number of Assignment Handover Decisions to Better Cell

[%]

HA_WO_SUC: Successful Assignment Handovers to Worse Cell of Total Number of Assignment Handover Decisions to Worse Cell

[%]

7.4.1 Ericsson1

H_DEC_TOT1: Total Number of Handover Decisions

H_DEC_SUC1: Handover Attempts of Total Number of Handover Decisions

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 61(96)



H_KCELL1: Handover Decisions to Better K-Cell of Total Number of Handover Decisions

[%]

H_LCELL1: Handover Decisions to Better L-Cell of Total Number of Handover Decisions

[%]

H_KL1: Handover Decision Due to Signal Strength of Total Number of Handover Decisions

H_BQ_DWN1: Handover Decisions due to Bad Downlink Quality of Total Number of Handover Decisions

[%]

H_BQ_UP1: Handover Decisions due to Bad Uplink Quality of Total Number of Handover Decisions

[%]

H_BQ_TOT1: Handover Decisions due to Bad Quality Both Links of Total Number of Handover Decisions

62(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


H_TA1: Handover Decisions due to Excessive Timing Advanceof Total Number of Handover Decisions

[%]

HA_BE1: Assignment Handover Decisions to Better Cell of Total Number of Handover Decisions

[%]

HA_WO1: Assignment Handover Decisions to Worse Cell of Total Number of Handover Decisions

[%]

7.4.2 Ericsson3

H_DEC_TOT3: Total Number of Handover Decisions

H_DEC_SUC3: Handover Attempts of Total Number of Handover Decisions

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 63(96)



H_HSS3: Handover Decisions at High Signal Strength of Total Number of Handover Decisions

[%]

H_LSS3: Handover Decisions at Low Signal Strength of Total Number of Handover Decisions

[%]

H_HLSS3: Handover Decisions at High and Low Signal Strength of Total Number of Handover Decisions

H_BQ_DWN3: Handover Decisions due to Bad Downlink Quality of Total Number of Handover Decisions

[%]

H_BQ_UP3: Handover Decisions due to Bad Uplink Quality of Total Number of Handover Decisions

[%]

H_BQ_TOT3: Handover Decisions due to Bad Quality Both Links of Total Number of Handover Decisions

64(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


H_TA3: Handover Decisions due to Excessive Timing Advanceof Total Number of Handover Decisions

[%]

HA_BE3: Assignment Handover Decisions to Better Cell of Total Number of Handover Decisions

[%]

HA_WO3: Assignment Handover Decisions to Worse Cell of Total Number of Handover Decisions

[%]

H_HR_ATT3: Handover Decisions at high Handover rate of all Handover Decisions

[%]

H_HR_SUC3: Successful Handovers at High Handover Rate of All Handover Decisions at High Handover Rate

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 65(96)



H_LSS-R3: Handover Decisions at Low Signal Strength of Total Number of SS Handover Decisions

[%]

H_HSS-R3: Handover Decisions at High Signal Strength of Total Number of SS Handover Decisions

[%]

7.4.3 Outgoing Handover to UTRAN cells

HU_SUC: Successful handovers to UTRAN cell of total Handover commands sent to UTRAN cell.

[%]

HU_RETURN: Handovers to UTRAN cell where MS returns to old channel of total Handover commands sent to UTRAN cell.

[%]

HU_LOST: Number of lost handovers to UTRAN cell, that is handovers that are not successsful and did not return to old channel, of total Handover commands sent to UTRAN cell.

[%]

66(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


8 Handover on SDCCHOBJECT TYPE: CELLCCHHO

S_H_SUC: Successful Handovers of Total Number of Handover Attempts on SDCCH

[%]

S_H_REV: MS Reversions to old channel of Total Number of Handover Attempts on SDCCH

[%]

S_H_LOST: MSs lost at Handover of Total Number of Handover attempts on SDCCH

[%]

9 GSM PositioningThese formulas are related to the feature BSS Positioning.

9.1 BSC formulasOBJECT TYPE: BSCPOS

POS_SM_RES: Number of successful Positioning response of number of request

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 67(96)



POS_SM_SUC: Number of Successful respons of total number of responses

[%]

POS_SM_ABR: Number of Aborted Positioning attempts of total number of responses

[%]

9.2 CELL formulasOBJECT TYPE: CELLPOS

POS_MS_SUC: Number of positioning respons sent from the MS of total number of request sent to the MS.

[%]

10 Idle Channel StatisticsFor Idle channel measurement no distinction between OL and UL have been done, except for two formulas (ICH_U and ICH_O). The character “y” denotes O (overlaid), U (underlaid) or O+U (overlaid + underlaid).

No distinction between half rate or full rate have been done. Instead the speech version is denoted with “x” in the formulas.

The formulas in this chapter can not be used for FR and HR together, if the network support both FR and HR.

10.1 Idle channelOBJECT TYPES: IDLEOTCHF, IDLEOTCHH, IDLEUTCHF,

IDLEUTCHH, CLTCH

ICH_1_y: Idle TCHs in Interference Band 1 of Total Idle TCHs

[%]

68(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28



[%]


[%]


[%]


[%]

ICH_U: Idle TCHs of Total Available TCHs in Underlaid Subcell

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 69(96)



ICH_O: Idle TCHs of Total Available TCHs in Overlaid Subcell

[%]

ICH_X: Idle TCHs of Total Available TCHs

[%]

70(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


11 GPRS/EGPRS StatisticsThe user-formulas are based on STS counters collected from the following object types.

User-Formula related to STS Object Types

BSC BSCGPRS, BSCQOS, LOADREG, LOAS

CELL CELLGPRS, TRAFFGPRS, CELLQOSG, RLINKBITR

RPP EMGPRS

Table 11-2. Relationship between counters used in user-formulas and STS object types in BSC/PCU.

11.1 BSC Level

11.1.1 General

OBJECT TYPES: BSCGPRS, LOADREG, LOAS

DISCDL: Discared PCU frames, downlink

DISCUL: Discared PCU frames, uplink

PAGCSBSC: Number of 08.18 PAGING CS messages with paging area including more than one cell

PAGCSCONG: Number of rejected 08.18 PAGING CS messages due to congestion

PAGPSBSC: Number of 08.18 PAGING PS messages with paging area including more than one cell

EAB/GRE/SNI-03:072 Rev B 2003-08-28 71(96)



NREJPCH: Number of rejected packet channel allocation attempts

PCU_FAIL_NR: Number of failed packet channel allocation attempts due to no PCU resources.

PS_REJPCU: Percentage rejected packet channel allocation attempts due to no PCU resources of total packet channel allocation attempts.

[%]

11.1.2 Quality of Service

OBJECT TYPES: BSCQOS

GQ_DA_BSC: Overall average IP throughput for GPRS, downlink:

Where Mode = Acknowledged, Unacknowledged, MBR = 20, 40, 60, 80, 100, 120, 140, 160 and QoS = THP1, THP2, THP3 and Background.

GQ_UA_BSC: Overall average IP throughput for GPRS, uplink:


EQ_DA_BSC: Overall average IP throughput for EGPRS, downlink:

72(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28



EQ_UA_BSC: Overall average IP throughput for EGPRS, uplink:


BQOS_G_PFCD: Average amount of LLC PDU data per TBF and active PFC during the measurement period for GPRS, downlink.


BQOS_G_PFCU: Average amount of LLC PDU data per TBF and active PFC during the measurement period for GPRS, uplink.

EAB/GRE/SNI-03:072 Rev B 2003-08-28 73(96)




BQOS_E_PFCD: Average amount of LLC PDU data per TBF and active PFC during the measurement period for EGPRS, downlink.


BQOS_E_PFCU: Average amount of LLC PDU data per TBF and active PFC during the measurement period for EGPRS, uplink.


11.2 Cell LevelOBJECT TYPES: CELLGPRS

Formulas containing the counters RBCDL or RBCUL will only be valid for Basic TBFs (B-TBF) and if Link Adaptation is not used. If B-TBFs and G-TBFs and E- TBFs are mixed, the formulas will become invalid. The affected formulas are marked with [B].

PCH_ACC_NR: Average Number of allocated PDCHs

74(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


PCH_ACT_NR: Average number of PDCHs carrying packet traffic, per cell in the measurement period

PDCH_USAGE: Average number of PDCHs carrying packet traffic of total number of PDCH allocated

[%]

PDCH_PEAK: Number of packet channel allocation attempts

Note: This counter does only count on 15 min bases. If collection is done with 60 min period, the counter will only show the peak during the last 15 min.

PCHALLATT: Number of packet channel allocation attempts

PCHAL_FAIL: Packet channel allocation failure rate

[%]

PREEMP_PCH: Total number of pre-empted PDCHs carrying packet traffic, per cell in the measurement period

PDRAC: Number of packet data random accesses

PDPRAC: Number of packet data packet random accesses

RBCDL: Total number of transmitted RLC data blocks, on B-TBF downlink. [B]

RBCUL: Total number of successfully received RLC data blocks, uplink

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BLK_VOL_DL: Number of successfully received RLC data blocks, on B-TBF downlink. [B]

BLK_VOL_UL: Estimated number of transmitted RLC data blocks, uplink

%_UL_RLC: Number of uplink successfully received RLC data blocks of total number of RLC data blocks. [B]

[%]

%_DL_RLC: Number of downlink successfully received RLC data blocks of total number of RLC data blocks. [B]

[%]

PS_BLER_DL: Number of retransmitted RLC data blocks of total number of RLC data blocks, on B-TBF downlink. [B]

[%]

PS_BLER_UL: Number of retransmitted RLC data blocks of total number of RLC data blocks, uplink

[%]

EPS_BLR_UL: Number of retransmitted EGPRS RLC data blocks of total number of EGPRS RLC data blocks, uplink

[%]

PS_TRA_DIR: This formula show which is the main traffic direction UL or DL, if only downlink transfer formula is equal to 1, if only uplink transfer it is –1 and if it equal uplink and downlink it is 0. [B]

76(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


Initially this formula can be used to detect cells with a lot of cell updates and little traffic.

RBC_PER_RA: Number of GPRS Radio Blocks per Random Access.

If it is low, data transferred is small per session, indicating signalling, otherwise higher value may indicate longer data transfer. [B]

PAGCSBVCI: Number of 08.18 PAGING CS messages to be transmitted on PCH

PPAGCSBVC: Number of 08.18 PAGING CS messages to be transmitted on PPCH

TBFDL_FAIL: Number of failed established downlink TBF due to lack of resources of total number of downlink TBF setup requests.

PRE_TBFM: Number of pre-empted TBF per TBF-minute.

PRE_PDCHM: Number of pre-emped PDCH per active PDCH-minute.

CELL_MOVED: Number of times a cell has been successfully moved from one RPP to another.

CELLMOVED

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MOVE_CELL_TBFM: Number of released TBFs due to move of cell from one RPP to another per TBF-minute.

TBF_RELM: Average time between a pre-emption and the next successful TBF establishment.

[second]

11.3 Cell Level GPRS/EGPRS Traffic Load, Radio Link Bitrate and Quality of ServiceOBJECT TYPES: TRAFFGPRS, CELLQOSG, RLINKBITR

11.3.1 GPRS/EGPRS Traffic LoadEDGE capable PDCH's, can carry GPRS and EGPRS TBF's simultanously. Traffic load indicators specified in this chapter are calculated separately for GPRS and EGPRS. With the available counters the traffic load indicators for total traffic including GPRS and EGPRS (load per PDCH, number of active PDCH per cell etc.) can not be calculated.

G_TBF_UL: Average number of simultaneous UL TBF for GPRS in a cell.

G_TBF_DL: Average number of simultaneous DL TBF for GPRS in a cell.

G_TBF_BL: Average number of simultaneous TBF, UL and DL, for GPRS in a cell

G_TBFP_UL: Average number of simultaneous UL TBF per PDCH for GPRS in a cell

78(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


G_TBFP_DL: Average number of simultaneous DL TBF for GPRS per PDCH in a cell

G_PDCH_UL: Average number of simultaneous UL PDCH for GPRS in a cell

G_PDCH_DL: Average number of simultaneous DL PDCH for GPRS in a cell

G_PDCH_TBF_DL: Average number of DL PDCH per TBF for GPRS in a cell.

G_PDCH_TBF_UL: Average number of UL PDCH per TBF for GPRS in a cell.

EG_PDCH_TBF_DL: Average number of DL PDCH per TBF for EGPRS in a cell.

EG_PDCH_TBF_UL: Average number of UL PDCH per TBF for EGPRS in a cell.

EG_TBF_UL: Average number of simultaneous UL TBF for EGPRS in a cell

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EG_TBF_DL: Average number of simultaneous DL TBF for EGPRS in a cell

EG_TBF_BL: Average number of simultaneous TBF, UL and DL, for EGPRS in a cell

EG_TBFP_UL: Average number of simultaneous UL TBF for EGPRS per PDCH in a cell

EG_TBFP_DL: Average number of simultaneous DL TBF for EGPRS per PDCH in a cell

EG_PDCH_UL: Average number of simultaneous UL PDCH for EGPRS in a cell

EG_PDCH_DL: Average number of simultaneous DL PDCH for EGPRS in a cell

11.3.2 Radio Link BitrateThe measurement of GPRS/EGPRS Radio Link Bitrate Distribution Downlink (RLINKBITR) is done per Cell and there are 6 counters. GPRS/EGPRS Radio Link Bitrate Distribution measures only for downlink G-TBF and E-TBF, that is RLC acknowledged mode, downlink TBFs that use coding scheme CS-1 to CS-4. To measure the bitrate for B-TBF, the normal radio block counters RBCDL and RBCUL has to be used.

G_BITR_AV: Estimated GPRS average radio link bitrate:

80(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


[kbit/s]

G_BITR_8: Percentage of GPRS TBF with average bitrate under 9 kbit/s of all GPRS TBF with measured bitrate.

*100%

G_BITR_10: Percentage of GPRS TBF with average bitrate between 9 and 11 kbit/s of all GPRS TBF with measured bitrate.

*100%


*100%


*100%


*100%

G_BITR_18: Percentage of GPRS TBF with average bitrate over 17 kbit/s of all GPRS TBF with measured bitrate.

EAB/GRE/SNI-03:072 Rev B 2003-08-28 81(96)



*100%

G_BR_BDCS2: Average Radio Link Bitrate for Basic TBF downlink, CS-2 mode.

[kbit/s]

G_BR_BUCS2: Average Radio Link Bitrate for Basic TBF uplink, CS-2 mode.

[kbit/s]

E_BITR_AV: Estimated EGPRS average radio link bitrate:

[kbit/s]

EG_BITR_10: Percentage of EGPRS TBF with average bitrate under 12.5 kbit/s of all EGPRS TBF with measured bitrate.

*100%

EG_BITR_15: Percentage of EGPRS TBF with average bitrate between 12.5 and 17.5 kbit/s of all EGPRS TBF with measured bitrate.

*100%


82(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


*100%


*100%


*100%


*100%


*100%


*100%

EAB/GRE/SNI-03:072 Rev B 2003-08-28 83(96)




*100%


*100%

11.3.3 GPRS/EGPRS Quality of Service and Traffic volumeThe feature GPRS/EGPRS Quality of Service adds more throughput and data measurements for PFC.

If the QoS feature is turned off (BSC Property PCUQOS-0), only the background class conters are used.

It should also be noted that the counters used below is only stepped for active PFC where at least 8 kbit has been transferred.

GQ_TP_UTZ: Average IP throughput per TBF and active PFC during the measurement period for GPRS Uplink and QoS class THPz:

[kbit/s]

Where z=1,2,3

GQ_TP_DTZ: Average IP throughput per TBF and active PFC during the measurement period for GPRS Downlink and QoS class THPz:

[kbit/s]

Where z=1,2,3

GQ_TP_UBG: Average IP throughput per TBF and active PFC during the measurement period for GPRS Uplink and QoS class BACKGROUND:

84(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


[kbit/s]

GQ_TP_DBG: Average IP throughput per TBF and active PFC during the measurement period for GPRS Downlink and QoS class BACKGROUND:

[kbit/s]

GQ_DA_UTZ: Average LLC PDU data per TBF and active PFC during the measurement period for GPRS Uplink and QoS class THPz:

[kbit]

Where z=1,2,3

GQ_DA_DTZ: Average LLC PDU data per TBF and active PFC during the measurement period for GPRS Downlink and QoS class THPz:

[kbit]

Where z=1,2,3

GQ_DA_UBG: Average LLC PDU data per TBF and active PFC during the measurement period for GPRS Uplink and QoS class BACKGROUND:

[kbit]

GQ_DA_DBG: Average LLC PDU data per TBF and active PFC during the measurement period for GPRS Downlink and QoS class BACKGROUND:

[kbit]

EGQ_TP_UTZ: Average IP throughput per TBF and active PFC during the measurement period for EGPRS Uplink and QoS class THPz:

[kbit/s]

Where z=1,2,3

EAB/GRE/SNI-03:072 Rev B 2003-08-28 85(96)



EGQ_TP_DTZ: Average IP throughput per TBF and active PFC during the measurement period for EGPRS Downlink and QoS class THPz:

[kbit/s]

Where z=1,2,3

EGQ_TP_UBG: Average IP throughput per TBF and active PFC during the measurement period for EGPRS Uplink and QoS class BACKGROUND:

[kbit/s]

EGQ_TP_DBG: Average IP throughput per TBF and active PFC during the measurement period for EGPRS Downlink and QoS class BACKGROUND:

[kbit/s]

EGQ_DA_UTZ: Average LLC PDU data per TBF and active PFC during the measurement period for EGPRS Uplink and QoS class THPz:

[kbit]

Where z=1,2,3

EGQ_DA_DTZ: Average LLC PDU data per TBF and active PFC during the measurement period for EGPRS Downlink and QoS class THPz:

[kbit]

Where z=1,2,3

EGQ_DA_UBG: Average LLC PDU data per TBF and active PFC during the measurement period for EGPRS Uplink and QoS class BACKGROUND:

[kbit]

EGQ_DA_DBG: Average LLC PDU data per TBF and active PFC during the measurement period for EGPRS Downlink and QoS class BACKGROUND:

86(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


[kbit]

GQ_DA_CELL: Data weighted average IP throughput per TBF and active PFC for GPRS, downlink:

[kbit/s]

Where z=1,2,3

GQ_UA_CELL: Data weighted average IP throughput per TBF and active PFC for GPRS, uplink:

[kbit/s]

Where z=1,2,3

EGQ_DA_CELL: Data weighted average IP throughput per TBF and active PFC for EGPRS, downlink:

[kbit/s]

Where z=1,2,3

EGQ_UA_CELL: Data weighted average IP throughput per TBF and active PFC for EGPRS, uplink:

[kbit/s]

Where z=1,2,3

EAB/GRE/SNI-03:072 Rev B 2003-08-28 87(96)



11.4 PCU Processor usage (RPP)OBJECT TYPES: EMGPRS

PS_RPLOAD: Percentage of time with the PCU-RP Processor load over 50%.

88(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


12 Multislot Connections per BSCOBJECT TYPE: BSCMSLOT

T_AS_SUC_M: Successful TCH Assignments of Total Number of Assignment Attempts for Multislot Connections

[%]

T_CM_SUC_M: Successful Configuration Changes for Multislot Connections Initiated by the MSC of all Configuration Change Attempts Initiated by the MSC

[%]

T_CB_SUC_M: Successful Configuration Changes for Multislot Connections Initiated by the BSC of all Configuration Change Attempts initiated by the BSC

[%]

H_SUC_M: Successful Handovers of Total Number of Handover Decisions for Multislot Connections

[%]

T_REQ_M: Average Number of Requested Channels for Multislot Connections

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 89(96)



T_ASS_M: Average Number of Assigned Channels for Multislot Connections

[%]

T_CB_RATEM: Configuration Change Attempts for Multislot Connections Initiated by the BSC of Total Number of Configuration Change Attempts

[%]

T_CM_RATEM: Configuration change attempts for Multislot Connections Initiated by the MSC of Total Number of Configuration Change Attempts

[%]

13 Transcoder StatisticsOBJECT TYPES: TRAPCOM, TRAPEVENT

TRA_USUC: Unsuccessful Transcoder Resource Allocation Attempts due to Not Defined Transcoder Pool of Total Transcoder Resource Allocation Attempts

[%]

TRAF_USUC: Unsuccessful Transcoder Resource Allocation Attempts due to Not Defined Transcoder Pool for Full Rate of Total Unsuccessful Transcoder Resource Allocation Attempts

[%]

90(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


TRAF1_USUC: Unsuccessful Transcoder Resource Allocation Attempts due to Not Defined Transcoder Pool for Full Rate Speech Version 1 of Total Unsuccessful Transcoder Resource Allocation Attempts

[%]

TRAF2_USUC: Unsuccessful Transcoder Resource Allocation Attempts due to Not Defined Transcoder Pool for Full Rate Speech Version 2 of Total Unsuccessful Transcoder Resource Allocation Attempts

[%]

TRAH_USUC: Unsuccessful Transcoder Resource Allocation Attempts due to Not Defined Transcoder Pool for Half Rate of Total Unsuccessful Transcoder Resource Allocation Attempts

[%]

TRA_CONG: Trancoder Allocation Attempts Failure due to Congestion of Total Number of Transcoder Allocation Attempts

[%]

TRA_CNGT: Transcoder Time Congestion of Total Measurement Interval

[%]

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TRA_AVAIL: Average Number of Available Transcoder Resources

TRA_ACT: Active Transcoder Resources of Available Transcoder Resources

[%]

TRA_IDLE: Idle Transcoder Resources of Available Transcoder Resources

[%]

TRASUB_AVL: Average Number of Available Transcoder Resources in Transcoder Subpool

TRASUB_ACT: Active Transcoder Resources of Available Transcoder Resources in Transcoder Subpool

[%]

TRASUB_IDL: Idle Transcoder Resources of Available Transcoder Resources in Transcoder Subpool

[%]

14 Connection Related Statistics

14.1 Successful TerminationOBJECT TYPE: CELEVENTD

The following formulas are calculated per cell and only TCH connections are considered. Signalling or Data connections are NOT counted.

92(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


TERM_SS: Low Signal Strength at Termination of Total Number of Terminated Calls

[%]

Note: DISBSS is stepped when the value of the signal strength is lower than LOWSSDL or LOWSSUL, which are exchange properties set by the operator.

TERM_BQ: Bad Quality at Termination of Total Number of Terminated Calls

[%]

Note: DISBQA is stepped when rxqual is greater than BADQDL or BADQUL, which are exchange properties set by the operator.

TERM_TA: Excessive Timing Advance at Termination of Total Number of Terminated Calls

[%]

Note: DISETA is stepped when TA is higher than or equal to the value of the cell parameter TALIM

14.2 Dropped Connections on Time slot BasisOBJECT TYPE: MOTS

The following formula is calculated per TS and both SDCCH and TCH connections are considered.

TS_DR: Abnormally Terminated Connections of Total Number of Connection Setup Attempts

[%]

15 AbisCalculations are performed per TRH device.

EAB/GRE/SNI-03:072 Rev B 2003-08-28 93(96)



OBJECT TYPE: LAPD

LI_INFO_RE: Number of Received Information Frames per Hour

[frames/h]

LI_INFO_TR: Number of Transmitted Information Frames per Hour

[frames/h]

LI_BADFRAM: Received Bad Frames of Total Number of Received Information Frames

[%]

LI_RETRANS: Retransmissions of Total Number of Transmitted Information Frames

[%]

LI_OVERLD: Number of Link Overloads per Hour

[overloads/h]

LI_FAIL: Number of Link Failures per Hour

[failures/h]

LI_PROTERR: Number of Link Protocol Errors per Hour

[protocol errors/h]

94(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


16 AterCalculations are performed per BSC.

OBJECT TYPE: ATERTRANS

A3_AVAIL: Average Number of available Ater interface transmission devices

A3_SEIZ: Average Number of partly or wholly seized Ater interface transmission devices

[%]

A3_BLOC: Average Number of Blocked Ater interface transmission devices

[%]

A3_CONG: Ater interface transmission congestion

[%]

EAB/GRE/SNI-03:072 Rev B 2003-08-28 95(96)



17 References

[1] Counters in the measurement database for traffic and event measurements in radio network, 28/155 17-APT 210 09 Uen Rev E1

[2] Counters in the measurement data base for GPRS statistics, 7/15517-CRT 240 06 Uen, Rev. PA35

[3] Flow graphs for incrementing and decrementing selected STS counters, 4/198 17-APT 210 09 Uen, Rev A

[4] User Description Radio Network Statistics, 62/1553-HSC 103 12/3 Uen, Rev D

96(96) EAB/GRE/SNI-03:072 Rev B 2003-08-28


18 Revision History

Document originally based on BSC STS USER-FORMULAS, ERICSSON GSM SYSTEM R8, GPD/P-00:0047 rev E.

Revision Date Remarks

Rev. A 2003-01-26 Doc. Responsible: Mikael Andersson EAB/GRE/SNI.

Rev. B 2003-08-28 Doc. Responsible: Masood Marofkhani EAB/ZG/NI

Date: Signature:

Author: 2002-04-02 (eramama)

Checked: 2002-04-02 (erarobl), (eraasml)

Approved: 2002-04-02 (erajova)

EAB/GRE/SNI-03:072 Rev B 2003-08-28 97(96)


bsc+sts+user+formulas+r9_rev_b

Documents

bsc formulas

cell formulas

number of bsc userformulas

handover statistics

sts statistics

bsc object types

ccchloadthe formulas

bsc level