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HUAWEI BSC6000 Base Station Controller
Performance Counter Reference Contents
Issue 02 (2007-02-06) Huawei Technologies Proprietary i
Contents
1 SCCP Measurement...................................................................................................................1-1
1.1 Overview of SCCP Measurement ........................................................... ...................................................... 1-2
1.2 SCCP OSP Measurement ........................................................ ................................................................ ......1-2
1.2.1 Overview of SCCP OSP Measurement ................................................................... .............................1-2
1.2.2 Number of Sent UDT Messages ............................................................. .............................................1-3
1.2.3 Number of Received UDT Messages...................................................................................................1-3
1.2.4 Number of Sent XUDT Messages........................................................................................................1-4
1.2.5 Number of Received XUDT Messages................................................................................................1-4
1.2.6 Number of Sent CR Messages ................................................................. ............................................1-4
1.2.7 Number of Received CR Messages......................................................................................................1-5
1.2.8 Number of Sent CREF Messages.........................................................................................................1-5
1.2.9 Number of Received CREF Messages.................................................................................................1-6
1.2.10 Ratio of CREF by Peer SCCP............................................................................................................1-6
1.2.11 Ratio of CREF by Local SCCP..........................................................................................................1-6
1.2.12 Received CC Messages......................................................................................................................1-7
1.2.13 Sent CC Messages..............................................................................................................................1-7
1.2.14 Sent DT1 Messages............................................................................................................................1-8
1.2.15 Received DT1 Messages....................................................................................................................1-8
1.2.16 Sent RLSD Messages.........................................................................................................................1-8
1.2.17 Received RLSD Messages.................................................................................................................1-9
1.2.18 Sent RLC Messages ................................................................ ........................................................... 1-9
1.2.19 Received RLC Messages ................................................................... .............................................. 1-10
2 MTP3 Measurement ..................................................................................................................2-1
2.1 Overview of MTP3 Measurement.................................................................................................................2-2
2.2 MTP3 Link Measurement ................................................................ ............................................................. 2-2
2.2.1 Overview..............................................................................................................................................2-2
2.2.2 In-Service Duration of MTP3 Link......................................................................................................2-3
2.2.3 Out-of-Service Duration of MTP3 Link...............................................................................................2-4
2.2.4 Duration of MTP3 Link Fault ..................................................................... .........................................2-4
2.2.5 Duration of MTP3 Link Local Inhibition.............................................................................................2-4
2.2.6 Duration of MTP3 Link Remote Inhibition ........................................................................ .................2-5
2.2.7 Duration of MTP3 Link Remote Processor Fault ............................................................. ...................2-5
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ii Huawei Technologies Proprietary Issue 02 (2007-02-06)
2.2.8 Duration of MTP3 Link Congestion ...................................................................... ..............................2-6
2.2.9 Failures of MTP3 Link for All Reasons...............................................................................................2-6
2.2.10 MTP3 Link Local Inhibitions .................................................................. ..........................................2-6
2.2.11 MTP3 Link Remote Inhibitions .................................................................... .....................................2-7
2.2.12 MTP3 Link Remote Processor Failures ........................................................... ..................................2-7
2.2.13 MTP3 Link Local Switchovers ............................................................ ..............................................2-8
2.2.14 MSUs Sent on MTP3 Link.................................................................................................................2-8
2.2.15 MSUs Received on MTP3 Link.........................................................................................................2-9
2.2.16 MTP3 Link Congestions .............................................................. ...................................................... 2-9
2.2.17 Discarded MSUs During Link Congestion .................................................................... ....................2-9
2.2.18 Transfer Inhibition Messages Received on MTP3 Link...................................................................2-10
2.2.19 Octets in SIFs or SIOs Sent on MTP3 Link.....................................................................................2-10
2.2.20 Octets in SIFs and SIOs Received by MTP3 Link...........................................................................2-11
2.2.21 64 kbit/s Timeslots Occupied by a Signaling Link...........................................................................2-11
2.2.22 Ratio of Transmit Bandwidth to Total Bandwidth ................................................................... ........2-11
2.2.23 Ratio of Receive Bandwidth to Total Bandwidth........................ ..................................................... 2-12
2.2.24 Bytes of MTP2 Message Head in MSU Messages on MTP3 Link..................................................2-12
3 LAPD Measurement ..................................................................................................................3-1
3.1 Overview of LAPD Measurement.................................................................................................................3-2
3.2 LAPD Link Measurement ............................................................... .............................................................. 3-2
3.2.1 Overview..............................................................................................................................................3-2
3.2.2 SABME Frames Sent on LAPD Link ..................................................................... .............................3-3
3.2.3 SABME Frames Received on LAPD Link ........................................................... ...............................3-4
3.2.4 REJ Frames Sent on LAPD Link.......................................................................... ...............................3-4
3.2.5 REJ Frames Received on LAPD Link .................................................................... .............................3-4
3.2.6 RNR Frames Sent on LAPD Link........................................................................................................3-5
3.2.7 RNR Frames Received on LAPD Link................................................................................................3-5
3.2.8 I Frames Resent on LAPD Link...........................................................................................................3-6
3.2.9 Incorrect I Frames Received on LAPD Link ...................................................................... .................3-6
3.2.10 I Frames Received on LAPD Link from Application Layer .............................................................. 3-6
3.2.11 I Frames Sent on LAPD Link.............................................................................................................3-7
3.2.12 I Frames Received by LAPD Link.....................................................................................................3-73.2.13 I Frames Discarded by LAPD Link ............................................................... ....................................3-8
3.2.14 UA Frames Sent on LAPD Link .......................................................................... ..............................3-8
3.2.15 UA Frames Received by LAPD Link.................................................................................................3-8
3.2.16 UI Frames Received by LAPD Link..................................................................................................3-9
4 System Load Measurement ......................................................................................................4-1
4.1 Overview of System Load Measurement .......................................................................... ............................4-2
4.2 CPU Usage Measurement ....................................................... ................................................................ ......4-2
4.2.1 Overview..............................................................................................................................................4-2
4.2.2 Mean CPU Usage.................................................................................................................................4-3
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4.2.3 Maximum CPU Usage .............................................................. ........................................................... 4-3
5 BTSM Management...................................................................................................................5-1
5.1 Overview of BTSM Measurement ..................................................................... ...........................................5-2
5.2 BTS State Measurement per BTS..................................................................................................................5-25.2.1 Overview..............................................................................................................................................5-2
5.2.2 Successful BTS Initializations ...................................................................... .......................................5-3
5.2.3 Failed BTS Initializations ................................................................ .................................................... 5-3
5.2.4 BTS OML Disruption Duration ..................................................................... ......................................5-4
5.2.5 BTS Out-of-Service Duration ..................................................................... .........................................5-4
5.2.6 BTS Availability...................................................................................................................................5-4
5.2.7 BTS In-Service Duration ........................................................................... ..........................................5-5
5.3 BTS Configuration Measurement per BM Subrack ........................................................................... ...........5-5
5.3.1 Overview..............................................................................................................................................5-5
5.3.2 Activated BTSs ............................................................. ....................................................................... 5-6
5.3.3 Available BTSs.....................................................................................................................................5-6
5.4 Cell State Measurement per Cell...................................................................................................................5-6
5.4.1 Overview..............................................................................................................................................5-6
5.4.2 Successful Cell Initializations..............................................................................................................5-7
5.4.3 Failed Cell Initializations.....................................................................................................................5-7
5.4.4 Cell BCCH Mutual Aid........................................................................................................................5-8
5.4.5 Recoveries after Cell BCCH Mutual Aid.............................................................................................5-8
5.4.6 Cell Baseband Hopping Mutual Aid .................................................................. ..................................5-9
5.4.7 Recoveries After Cell Baseband Hopping Mutual Aid ............................................................. ...........5-9
5.4.8 Cell Out-of-Service Duration...............................................................................................................5-9
5.4.9 Cell Availability ............................................................. .................................................................... 5-10
5.4.10 Cell In-Service Duration ..................................................................... ............................................. 5-10
5.5 Cell Configuration Measurement per BM Subrack.....................................................................................5-11
5.5.1 Overview............................................................................................................................................5-11
5.5.2 Activated Cells...................................................................................................................................5-11
5.5.3 Available Cells .............................................................. ................................................................ .....5-11
5.6 TRX State Measurement per TRX................................................................... ........................................... 5-12
5.6.1 Overview............................................................................................................................................5-125.6.2 TRX Out-of-Service Duration............................................................................................................5-12
5.7 TRX Configuration Measurement per BM Subrack....................................................................................5-13
5.7.1 Overview............................................................................................................................................5-13
5.7.2 Activated TRXs..................................................................................................................................5-13
5.7.3 Available TRXs................................................................... ............................................................... 5-13
5.7.4 TRX Availability ............................................................ .................................................................... 5-14
5.8 CRC Error Measurement per BTS .................................................................. ............................................ 5-14
5.8.1 Overview............................................................................................................................................5-14
5.8.2 Duration of CRC Error on Ports 0 Through 23..................................................................................5-15
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5.9 CRC Serious Error Measurement per BTS .............................................................. ...................................5-16
5.9.1 Overview............................................................................................................................................5-16
5.9.2 Duration of Serious CRC Error on Ports 0 Through 23 ................................................................... ..5-16
5.10 OML Measurement per BTS.....................................................................................................................5-18
5.10.1 Overview..........................................................................................................................................5-18
5.10.2 OML Setup Requests Sent by BTS................................................................... ...............................5-19
5.10.3 OML Setup Requests Received by BTS ............................................................... ...........................5-19
5.10.4 BTS-Sent Rejects to the OML Setup Requests ................................................................ ................5-20
5.10.5 BTS-Received Rejects to the OML Setup Requests ........................................................................ 5-20
5.10.6 OML RNR Frames Sent by BTS.......................................................................................... ............5-21
5.10.7 OML RNR Frames Received by BTS..............................................................................................5-21
5.10.8 OML I Frames Resent by BTS.........................................................................................................5-22
5.10.9 OML NRERR Received by BTS ....................................................................... ..............................5-22
5.10.10 OML L3 Data Requests Received by BTS ............................................................ ........................5-23
5.10.11 OML I Frames Sent by BTS...........................................................................................................5-23
5.10.12 OML I Frames Received by BTS...................................................................................................5-24
5.10.13 Queue Overflows of OML Messages Sent by BTS..................................... ...................................5-24
5.10.14 Erroneously Received OML Long Frames by BTS Physical Layer............................................... 5-25
5.10.15 OML Byte Errors Received by BTS Physical Layer......................................................................5-25
5.10.16 OML Discarded Series Received by BTS Physical Layer ............................................................. 5-26
5.10.17 OML CRC Errors Received by BTS..............................................................................................5-26
5.10.18 L1 and L2 Overflows of BTS OML...............................................................................................5-27
5.10.19 Total OML Frames Received by BTS Physical Layer ................................................................... 5-275.11 RSL Measurement per TRX .................................................................... ..................................................5-28
5.11.1 Overview..........................................................................................................................................5-28
5.11.2 RSL Setup Requests Sent from BTS................................................................... .............................5-29
5.11.3 RSL Setup Requests Received from BTS ................................................................... .....................5-29
5.11.4 BTS-Sent Rejects to the RSL Setup Requests Sent by BTS ............................................................ 5-30
5.11.5 BTS-Received Rejects to the RSL Setup Requests .......................................................... ................5-30
5.11.6 RSL RNR Frames Sent by BTS.................................................................. .....................................5-31
5.11.7 RSL RNR Frames Received by BTS................................................... .............................................5-31
5.11.8 RSL I Frames Resent by BTS ....................................................................... ...................................5-32
5.11.9 RSL NRERR Received by BTS......................................................................... ..............................5-32
5.11.10 RSL Layer 3 Requests Received by BTS.......................................................................................5-33
5.11.11 RSL I Frames Sent by BTS......................................................................... ...................................5-33
5.11.12 RSL I Frames Received by BTS ...................................................................... ..............................5-34
5.11.13 Queue Overflows of RSL Messages Sent by BTS ......................................................................... 5-34
5.11.14 Erroneously Received RSL Long Frames by BTS Physical Layer ................................................ 5-35
5.11.15 RSL Octet Errors Received by BTS Physical Layer ...................................................................... 5-35
5.11.16 RSL Discarded Sequences Received by BTS Physical Layer........................ ................................5-36
5.11.17 RSL CRC Errors Received by BTS................................................................................................5-36
5.11.18 L1 and L2 Overflows of BTS RSL ..................................................................... ...........................5-37
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5.11.19 Total RSL Frames Received by BTS Physical Layer ........................................................... ..........5-37
6 Resources Measurement...........................................................................................................6-1
6.1 Overview of Resources Measurement...........................................................................................................6-2
6.2 A Interface Circuit Measurement per DPC................................................................................... .................6-26.2.1 Overview..............................................................................................................................................6-2
6.2.2 Mean Number of Uninstalled Circuits on the A Interface................. ................................................... 6-3
6.2.3 Mean Number of Faulty Circuits on the A Interface........................................................................ ....6-3
6.2.4 Mean Number of Circuits in Maintenance State on the A Interface........................ .............................6-4
6.2.5 Mean Number of Blocked Circuits on the A Interface.........................................................................6-4
6.2.6 Mean Number of Idle Circuits on the A Interface................................................................................6-5
6.2.7 Mean Number of Busy Circuits on the A Interface..............................................................................6-5
6.2.8 Mean Number of Circuits with Uninstalled Peer Circuits on the A Interface ......................................6-6
6.3 TC Measurement per DPC .................................................................. .......................................................... 6-6
6.3.1 Overview..............................................................................................................................................6-6
6.3.2 Mean Number of Faulty TC Resources................................................................................................6-7
6.3.3 Mean Number of Idle TC Resources....................................................................................................6-7
6.3.4 Mean Number of Busy TC Resources..................................................................................................6-8
6.4 Pb Interface Circuit Measurement per PCU..................................................................................................6-8
6.4.1 Overview..............................................................................................................................................6-8
6.4.2 Mean Number of Faulty Circuits on the Pb Interface .................................................................. ........6-9
6.4.3 Mean Number of Blocked Circuits on the Pb Interface .................................................................... ...6-9
6.4.4 Mean Number of Idle Circuits on the Pb Interface ............................................................ ................6-10
6.4.5 Mean Number of Busy Circuits on the Pb Interface .............................................................. ............6-10
6.4.6 Mean Number of Circuits in Maintenance State on the Pb Interface................................................. 6-11
6.5 Ater Interface Circuit Measurement per BM Subrack.................................................................................6-11
6.5.1 Overview............................................................................................................................................6-11
6.5.2 Mean Number of Faulty Circuits on the Ater Interface......................................................................6-12
6.5.3 Mean Number of Idle Circuits on the Ater Interface..........................................................................6-12
6.5.4 Mean Number of Busy Circuits on the Ater Interface........................................................................6-13
7 MSC Measurement....................................................................................................................7-1
7.1 Overview of MSC Measurement...................................................................................................................7-2
7.2 MSC Measurement per DPC.........................................................................................................................7-2
7.2.1 Overview..............................................................................................................................................7-2
7.2.2 Number of MSC Resets ................................................................. ...................................................... 7-2
7.2.3 Number of Messages Received from MSC..........................................................................................7-3
8 CBC Measurement .....................................................................................................................8-1
8.1 Overview of CBC Measurement ...................................................................... ............................................. 8-2
8.2 CBC Measurement per BSC ................................................................. ........................................................ 8-2
8.2.1 Overview..............................................................................................................................................8-2
8.2.2 WRITE-REPLACE Requests Received by BSC ................................................................... ..............8-3
8.2.3 KILL Requests Received by BSC........................................................................................................8-4
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8.2.4 STATUS-CBCH-QUERY Requests Received by BSC...................... ..................................................8-4
8.2.5 STATUS-MESSAGE-QUERY Requests Received by BSC ................................................................ 8-4
8.2.6 SET-DRX Requests Received by BSC ............................................................................ ....................8-5
8.2.7 RESET Requests Received by BSC.....................................................................................................8-5
8.2.8 REPORT Responses to WRITE-REPLACE Requests.................................................................. .......8-6
8.2.9 REJECT Responses to WRITE-REPLACE Requests.......................................................................... 8-6
8.2.10 REPORT Responses to KILL Requests .................................................................. ...........................8-7
8.2.11 REJECT Responses to KILL Requests ................................................................... ...........................8-7
8.2.12 REPORT Responses to STATUS-CBCH-QUERY Requests ............................................................. 8-8
8.2.13 REJECT Responses to STATUS-CBCH-QUERY Requests .............................................................. 8-8
8.2.14 REPORT Responses to STATUS-MESSAGE-QUERY Requests......................................................8-9
8.2.15 REJECT Responses to STATUS-MESSAGE-QUERY Requests ......................................................8-9
8.2.16 REPORT Responses to SET-DRX Requests....................... ............................................................. 8-10
8.2.17 REJECT Responses to SET-DRX Requests............................................... ......................................8-10
8.2.18 RESTART-INDICATION Requests Sent from BSC...................................................................... ..8-11
8.2.19 REJECT Responses to RESTART-INDICATION Requests ............................................................ 8-11
8.2.20 FAILURE-INDICATION Requests Sent from BSC.................................................................. ......8-12
8.2.21 CBCH Loading Indications Received by BSC (Overflow)..............................................................8-12
8.2.22 CBCH Loading Indications Received by BSC (Underflow)............................................................8-12
8.2.23 WRITE-REPLACE Requests (WRITE Requests) Received by BSC..............................................8-13
8.2.24 REPORT Responses to WRITE-REPLACE Requests (WRITE Requests) .....................................8-13
8.2.25 REJECT Responses to WRITE-REPLACE Requests (WRITE Requests) ......................................8-14
8.2.26 WRITE-REPLACE Requests (REPLACE Requests) Received by BSC..................... ....................8-148.2.27 REPORT Responses to WRITE-REPLACE Requests (REPLACE Requests) ................................8-15
8.2.28 REJECT Responses to WRITE-REPLACE Requests (REPLACE Requests) .................................8-15
8.2.29 Mean Capacity of BSC Message Library.........................................................................................8-16
8.2.30 Disruptions of the BSC-CBC Connection........................................................................................8-16
9 PCU Measurement .....................................................................................................................9-1
9.1 Overview of PCU Measurement ..................................................................... ..............................................9-2
9.2 PCU Measurement per BSC..........................................................................................................................9-2
9.2.1 Overview..............................................................................................................................................9-2
9.2.2 Total Messages Received from PCU....................................................................................................9-29.3 PCU Measurement per PCU ........................................................... .............................................................. 9-3
9.3.1 Overview..............................................................................................................................................9-3
9.3.2 Messages Received from a PCU..........................................................................................................9-3
10 Paging Measurement.............................................................................................................10-1
10.1 Overview of Paging Measurement.................................................................... ........................................10-2
10.2 A Interface Paging Measurement ............................................................ .................................................. 10-2
10.2.1 Overview of A Interface Paging Measurement ...................................................................... ..........10-2
10.2.2 MSC-Initiated Paging Requests for CS Service...............................................................................10-3
10.2.3 SGSN-Initiated Paging Requests for CS Service............. ................................................................ 10-3
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10.2.4 SGSN-Initiated Paging Requests for PS Service ........................................................................... ..10-4
10.2.5 Delivered to BTS for CS Service.....................................................................................................10-5
10.3 Abis Interface Paging Measurement..........................................................................................................10-6
10.3.1 Overview of Abis Interface Paging Measurement ............................................................ ...............10-6
10.3.2 Delivered Paging Messages for CS Service.....................................................................................10-6
10.3.3 Delivered Paging Messages for PS Service ........................................................................ .............10-7
10.4 Measurement of Discarded Paging Messages due to Overload per LAPD ...............................................10-8
10.4.1 Overview of Measurement of Discarded Paging Messages due to Overload per LAPD................. 10-8
10.4.2 SM Pagings Discarded on LAPD Link ..................................................................... .......................10-9
10.4.3 CS Pagings Discarded on LAPD Link ....................................................................... ......................10-9
10.4.4 PS Pagings Discarded on LAPD Link ....................................................................... ......................10-9
11 Call Measurement..................................................................................................................11-1
11.1 Overview of Call Measurement.................................................................................................................11-3
11.2 Call Duration Measurement per BSC........................................................................................................11-4
11.2.1 Overview..........................................................................................................................................11-4
11.2.2 Mean Duration of Call Access ........................................................................... .............................. 11-4
11.2.3 Mean Duration of Call Establishment..............................................................................................11-4
11.3 Flow Control Measurement per Cell .................................................................... ..................................... 11-5
11.3.1 Overview..........................................................................................................................................11-5
11.3.2 MSG DEL IND Messages Sent on Abis Interface .............................................................. .............11-6
11.3.3 MSG CCCH LOAD IND (RACH) Messages Sent on Abis Interface.............................................. 11-6
11.3.4 MSG CCCH LOAD IND (PCH) Messages Sent on Abis Interface............. .................................... 11-7
11.3.5 PACKET CCCH LOAD IND Messages Sent on Abis Interface...................................................... 11-7
11.3.6 MSG ABIS OVERLOAD (CCCH OVERLOAD) Messages Sent on Abis Interface ...................... 11-8
11.3.7 MSG ABIS OVERLOAD (PROCESSOR OVERLOAD) Messages Sent on Abis Interface ..........11-8
11.3.8 LOAD IND Messages Sent on the A-Interface.......... ...................................................................... 11-9
11.3.9 Increases of Flow Control Levels.....................................................................................................11-9
11.3.10 Decreases of Flow Control Levels .......................................................................... ..................... 11-10
11.3.11 Ignored Trigger Events......................................... ...................................................................... .. 11-11
11.3.12 Highest Level Delays .................................................................... ............................................... 11-11
11.4 Short Message Measurement per Cell.....................................................................................................11-12
11.4.1 Overview........................................................................................................................................11-1211.4.2 Uplink Point-to-Point Short Messages on SDCCH........................................................................11-12
11.4.3 Downlink Point-to-Point Short Messages on SDCCH................................................................... 11-13
11.4.4 Uplink Point-to-Point Short Messages on TCH................................................................. ............11-13
11.4.5 Downlink Point-to-Point Short Messages on TCH ............................................................. ...........11-13
11.4.6 Total Uplink Point-to-Point Short Messages..................................................................................11-14
11.4.7 Total Downlink Point-to-Point Short Messages........................................................................... ..11-14
11.4.8 Point-to-Point Short Messages on SDCCH....................................................................................11-15
11.4.9 Point-to-Point Short Messages on TCH ................................................................. ........................ 11-15
11.5 Call Drop Measurement per Cell.............................................................................................................11-15
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11.5.1 Overview........................................................................................................................................11-15
11.5.2 Call Drop Sampled Measurement per Cell.....................................................................................11-16
11.5.3 Call Drop Analyzed Measurement per Cell.................................................................................. ..11-21
11.6 Channel Activation Measurement per Cell..............................................................................................11-29
11.6.1 Overview........................................................................................................................................11-29
11.6.2 SDCCH Connection Measurement per Cell...................................................................................11-30
11.6.3 TCH Connection Measurement per Cell .................................................................. ...................... 11-32
11.6.4 Channel Activation Analyzed Measurement per Cell................................................................... ..11-37
11.7 Channel Seizure Measurement per TRX......................................................................... ........................ 11-42
11.8 Immediate Assignment Measurement per Cell........................................................................................11-45
11.8.1 Overview........................................................................................................................................11-45
11.8.2 Channel Requests per Cell ...................................................................... ....................................... 11-46
11.8.3 Immediate Assignment Commands per Cell .................................................................... ..............11-47
11.8.4 Call Setup Indications per Cell.......................................................................................................11-49
11.8.5 Rejects to Service Requests per Cell..............................................................................................11-51
11.8.6 Immediate Assignment Analyzed Measurement per Cell....................................... ........................ 11-52
11.9 Assignment Measurement per Cell..........................................................................................................11-55
11.9.1 Overview........................................................................................................................................11-55
11.9.2 Assignment Requests per Cell........................................................................................................11-55
11.9.3 Assignment Commands per Cell....................................................................................................11-58
11.9.4 Completed Assignments per Cell .................................................................... ............................... 11-60
11.9.5 Failed Assignments per Cell...........................................................................................................11-61
11.9.6 Mode Modify Commands per Cell.................................................................................................11-6411.9.7 Failed Mode Modify Attempts per Cell ............................................................................ .............11-66
11.9.8 Assignment Procedure Analyzed Measurement per Cell ............................................................ ...11-68
11.10 Intra-Cell Handover Measurement per Cell ..................................................................... ..................... 11-70
11.10.1 Overview......................................................................................................................................11-70
11.10.2 Intra-Cell Handover Requests per Cell ................................................................ ........................ 11-72
11.10.3 Intra-Cell Handover Commands per Cell.....................................................................................11-73
11.10.4 Failed Intra-Cell Handovers per Cell ....................................................................... .................... 11-74
11.10.5 Intra-Cell AMR Handover per Cell..............................................................................................11-80
11.10.6 Intra-Cell Handover Detection Messages Received by BSC per Cell.......................................... 11-82
11.10.7 Intra-Cell Handover Measurement per Cell ........................................................................ .........11-83
11.11 Incoming Internal Inter-Cell Handover Measurement per Cell ............................................................. 11-88
11.11.1 Overview......................................................................................................................................11-88
11.11.2 Incoming Internal Inter-Cell Handover Requests per Cell ........................................................... 11-90
11.11.3 Incoming Internal Inter-Cell Handover Responses per Cell......................................................... 11-91
11.11.4 Failed Incoming Internal Inter-Cell Handovers per Cell..............................................................11-93
11.11.5 Incoming Internal Inter-Cell Handover Detection Messages Received by BSC per Cell ............11-97
11.11.6 Incoming Internal Inter-Cell Handover Analyzed Measurement per Cell .................................... 11-98
11.12 Outgoing Internal Inter-Cell Handover Measurement per Cell ........................................................... 11-100
11.12.1 Overview....................................................................................................................................11-100
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11.12.2 Outgoing Internal Inter-Cell Handover Requests per Cell ......................................................... 11-105
11.12.3 Outgoing Internal Inter-Cell Handover Commands per Cell ..................................................... 11-108
11.12.4 Failed Outgoing Internal Inter-Cell Handovers per Cell ........................................................... . 11-111
11.12.5 Outgoing Internal Inter-Cell Handover Measurement per Cell.................................................. 11-121
11.13 Incoming External Inter-Cell Handover Measurement per Cell................................. ......................... 11-126
11.13.1 Overview....................................................................................................................................11-126
11.13.2 Incoming External Inter-Cell Handover Requests per Cell........................................................11-128
11.13.3 Incoming External Inter-Cell Handover Responses per Cell ..................................................... 11-130
11.13.4 Failed Incoming External Inter-Cell Handovers per Cell...........................................................11-131
11.13.5 Incoming External Inter-Cell Handover Detection Messages Received by BSC per Cell .........11-136
11.13.6 Incoming External Inter-Cell Handover Analyzed Measurement per Cell................................. 11-137
11.14 Outgoing External Inter-Cell Handover Measurement per Cell .......................................................... 11-140
11.14.1 Overview....................................................................................................................................11-140
11.14.2 Outgoing External Inter-Cell Handover Requests per Cell ........................................................ 11-144
11.14.3 Outgoing External Inter-Cell Handover Commands per Cell .................................................... 11-147
11.14.4 Failed Outgoing External Inter-Cell Handovers per Cell...........................................................11-151
11.14.5 Outgoing External Inter-Cell Handover Analyzed Measurement per Cell................................. 11-164
11.15 Incoming Inter-RAT Inter-Cell Handover Measurement per Cell ....................................................... 11-170
11.15.1 Overview....................................................................................................................................11-170
11.15.2 Incoming Inter-RAT Inter-Cell Handover Requests per Cell ..................................................... 11-172
11.15.3 Incoming Inter-RAT Inter-Cell Handover Responses per Cell ................................................... 11-173
11.15.4 Failed Incoming Inter-RAT Inter-Cell Handovers per Cell ........................................................ 11-174
11.15.5 Incoming Inter-RAT Inter-Cell Handover Analyzed Measurement per Cell .............................. 11-17611.16 Outgoing Inter-RAT Inter-Cell Handover Measurement per Cell ....................................................... 11-178
11.16.1 Overview....................................................................................................................................11-178
11.16.2 Outgoing Inter-RAT Inter-Cell Handover Requests per Cell ..................................................... 11-181
11.16.3 Outgoing Inter-RAT Inter-Cell Handover Commands per Cell .................................................. 11-182
11.16.4 Failed Outgoing Inter-RAT Inter-Cell Handovers per Cell ........................................................ 11-183
11.16.5 Outgoing Inter-RAT Inter-Cell Handover Analyzed Measurement per Cell .............................. 11-189
11.17 GSM Cell to GSM Cell Incoming Handover Measurement................................................................11-193
11.17.1 Overview....................................................................................................................................11-193
11.17.2 Cell Incoming Handover Requests (Cell to Cell).......................................................................11-194
11.17.3 Failed Cell Incoming Handovers (Cell to Cell)..........................................................................11-194
11.17.4 Cell Incoming Handover Analyzed Measurement (Cell to Cell).................... ............................ 11-195
11.18 GSM Cell to GSM Cell Outgoing Handover Measurement ................................................................ 11-196
11.18.1 Overview....................................................................................................................................11-196
11.18.2 Cell Outgoing Handover Commands (Cell to Cell) ................................................................... 11-197
11.18.3 Failed Cell Outgoing Handovers (Cell to Cell)..........................................................................11-198
11.18.4 Cell Outgoing Handover Analyzed Measurement (Cell to Cell)...................... .......................... 11-200
11.19 Measurement of MRs upon Handover Initiation per Cell ......................................................... .......... 11-201
11.19.1 Overview....................................................................................................................................11-201
11.19.2 Measurement of MRs upon Handover Initiation (Receiving Quality) per Cell.......................... 11-202
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11.19.3 Mean Uplink Receiving Level during Handover Initiation per Cell .......................................... 11-203
11.19.4 Mean Uplink Receiving Quality during Handover Initiation per Cell ....................................... 11-204
11.19.5 Concentric Cell Handover Initiation MR Analyzed Measurement (Receiving Level) per Cell .11-205
11.19.6 Concentric Cell Handover Initiation MR Analyzed Measurement (Timing Advance) per Cell .11-206
11.20 KPI Measurement per Cell ........................................................................ .......................................... 11-207
11.20.1 Overview....................................................................................................................................11-207
11.20.2 Immediate Assignment Requests .................................................................... ........................... 11-208
11.20.3 Immediate Assignment Commands............................................................................................11-209
11.20.4 SDCCH Seizure Requests ........................................................................ .................................. 11-209
11.20.5 Failed SDCCH Seizures due to Busy SDCCH...........................................................................11-210
11.20.6 Successful SDCCH Seizures......................................................................................................11-210
11.20.7 Traffic Volume on SDCCH ....................................................................... ................................. 11-211
11.20.8 Traffic Volume on SDCCH ....................................................................... ................................. 11-212
11.20.9 Available SDCCHs.....................................................................................................................11-212
11.20.10 Configured SDCCHs................................................................................................................11-212
11.20.11 TCH Seizure Requests (Signaling Channel)............................................................................. 11-213
11.20.12 Failed TCH Seizures due to Busy TCH (Signaling Channel) .................................................. 11-213
11.20.13 Successful TCH Seizures (Signaling Channel) .............................................................. .......... 11-214
11.20.14 Call Drops on TCH (Signaling Channel) ...................................................................... ........... 11-214
11.20.15 Traffic Volume on TCH (Signaling Channel)....................................... .................................... 11-215
11.20.16 TCH Seizure Requests (Traffic Channel)......... ..................................................................... ...11-215
11.20.17 Failed TCH Seizures due to Busy TCH (Traffic Channel)..................................................... ..11-216
11.20.18 Successful TCH Seizures (Traffic Channel)............................................................................ .11-21611.20.19 Call Drops on TCH in Stable State (Traffic Channel)................................. ............................. 11-216
11.20.20 TCH Seizure Requests in TCH Handovers (Traffic Channel)............................. ..................... 11-217
11.20.21 Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel)........................ 11-218
11.20.22 Successful TCH Seizures in TCH Handovers (Traffic Channel) ............................................. 11-218
11.20.23 Call Drops in TCH Handovers (Traffic Channel) .................................................................... 11-219
11.20.24 Traffic Volume on TCH (Traffic Channel) .......................................................................... .....11-219
11.20.25 Available TCHs ................................................................ ........................................................ 11-220
11.20.26 Configured TCHs.................................................................... ................................................. 11-220
11.20.27 Dual-Band Handover Requests ...................................................................... .......................... 11-220
11.20.28 Successful Dual-Band Handovers............................................................................................11-221
11.21 Calls Discarded due to Overload per LAPD........................................................................................11-223
11.21.1 Overview....................................................................................................................................11-223
11.21.2 Random Access Requests Discarded on LAPD ................................................................... ......11-223
12 MR Measurement...................................................................................................................12-1
12.1 Overview of MR Measurement.................................................................................................................12-3
12.2 Number of MRs per Cell...........................................................................................................................12-3
12.2.1 Overview of Number of MRs per Cell.............................................................................................12-3
12.2.2 Sampled MRs per Cell .................................................................. ................................................... 12-4
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12.2.3 Analyzed MRs per Cell....................................................................................................................12-5
12.3 Interference Band Measurement per TRX.................................................................................................12-6
12.3.1 Overview of Interference Band Measurement per TRX .................................................................. 12-6
12.3.2 Sampled Measurement of Interference Band per TRX.................................................................... 12-7
12.3.3 Analyzed Measurement of Interference Band per TRX................................................................... 12-8
12.4 Power Control Messages per Cell ........................................................................ ...................................12-10
12.4.1 Overview of Power Control Messages per Cell ................................................................ .............12-10
12.4.2 Number of Power Control Messages per Cell................................................................................12-11
12.4.3 Sampled Power Rank During Power Control per Cell.............................. .....................................12-12
12.4.4 Analyzed Power Rank During Power Control per Cell............................. .....................................12-12
12.4.5 Sampled Level of Power Control Signals per Cell........................................................... ..............12-13
12.4.6 Analyzed Level of Power Control Signals per Cell ....................................................................... 12-14
12.4.7 Sampling Quality of Power Control Signals per Cell ................................................................. ...12-14
12.4.8 Analyzed Quality of Power Control Signals per Cell.....................................................................12-15
12.4.9 Sampled Duration of Maximum Power per Cell............................................................................12-15
12.4.10 Analyzed Duration of Maximum Power per Cell.........................................................................12-16
12.4.11 Distance Between MS and BTS per Cell ................................................................ .....................12-17
12.4.12 Maximum Distance Between MS and BTS per Cell....................................................................12-17
12.4.13 Number of Power Control Messages per Cell..............................................................................12-18
12.4.14 Mean Distance Between MS and BTS.........................................................................................12-18
12.5 Neighbor Cell Level Measurement per Cell............................................................................................12-18
12.5.1 Overview of Neighbor Cell Level Measurement per Cell..............................................................12-18
12.5.2 Strength of Signals in Neighbor Cells............................................................................................12-1912.5.3 Number of MRs of Neighbor Cells................................................................................................12-19
12.5.4 Mean Strength of Signals in Neighbor Cells..................................................................................12-20
12.6 TCHF Receive Level Measurement per TRX................................................................. ........................12-20
12.7 TCHH Receive Level Measurement per TRX.........................................................................................12-29
12.8 Receive Quality Measurement per TRX .............................................................. ...................................12-36
12.9 Uplink-and-Downlink Balance Measurement per TRX.............................................................. ............12-39
12.10 Number of MRs Based on TA per TRX ........................................................... .....................................12-41
12.11 Radio Link Failure Measurement per TRX......... ..................................................................... .............12-43
12.11.1 Overview of Radio Link Failure Measurement per TRX................... .......................................... 12-43
12.11.2 Uplink and Downlink Level During Radio Link Failure per TRX...............................................12-44
12.11.3 Mean Uplink and Downlink Level During Radio Link Failure per TRX ....................................12-44
12.11.4 Uplink and Downlink Quality During Radio Link Failure per TRX............................................ 12-46
12.11.5 Mean Uplink and Downlink Quality During Radio Link Failure per TRX..................................12-47
12.11.6 TA During Radio Link Failure per TRX .................................................................... ..................12-48
12.11.7 Mean TA During Radio Link Failure per TRX ..................................................................... .......12-48
12.11.8 Sampled Radio Link Failures per TRX........................................................................................12-49
12.12 Radio Link Failure Measurement based on TA per TRX ................................................................... ...12-50
12.13 RQI Measurement based on TA per TRX..............................................................................................12-52
12.13.1 Overview of RQI Measurement based on TA per TRX ............................................................... 12-52
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12.13.2 Sampled RQI based on TA per TRX........................................................ ....................................12-52
12.13.3 Analyzed RQI based on TA per TRX........................................................ ...................................12-55
13 Channel Measurement ..........................................................................................................13-1
13.1 Overview of Channel Measurement..........................................................................................................13-313.2 Channel Configuration Measurement per Cell..........................................................................................13-3
13.2.1 Overview..........................................................................................................................................13-3
13.2.2 Sampled Measurement of Initially Configured Channels ................................................................ 13-4
13.2.3 Analyzed Measurement of Dynamically Configured Channels ....................................................... 13-7
13.2.4 Analyzed Measurement of Available Channels............................................................................ ..13-12
13.2.5 SDCCH Availability.......................................................................................................................13-19
13.2.6 TCH Availability .......................................................... .................................................................. 13-19
13.2.7 Analyzed Measurement of Initially Configured Channels ............................................................. 13-20
13.3 Channel Conversion Measurement per Cell............................................................................................13-22
13.3.1 Overview........................................................................................................................................13-22
13.3.2 Channel Conversion Requests (TCHF-TCHH)..............................................................................13-23
13.3.3 Successful Channel Conversions (TCHF-TCHH) ................................................................ .........13-24
13.3.4 Channel Conversion Requests (TCHH-TCHF)..............................................................................13-25
13.3.5 Successful Channel Conversions (TCHH-TCHF) ......................................................................... 13-25
13.3.6 Number of Channel Conversions (TCH-SDCCH).........................................................................13-26
13.3.7 Number of Channel Conversions (SDCCH-TCH).........................................................................13-27
13.4 Channel Busy Duration Measurement per Cell.......................................................................................13-27
13.4.1 Overview........................................................................................................................................13-27
13.4.2 Busy State Duration of All Channels (SDCCH/TCHF/TCHH) ..................................................... 13-28
13.4.3 Mean Duration of Busy State for All Channels (SDCCH/TCHF/TCHH)......................................13-29
13.5 Measurement of Maximum Busy Channels per Cell...............................................................................13-30
13.6 Channel State Measurement per Cell ................................................................. .....................................13-31
13.6.1 Overview........................................................................................................................................13-31
13.6.2 Mean Number of Busy Signaling Channels (SDCCH/TCHF/TCHH)........... ................................13-32
13.6.3 Mean Number of Busy TCHs (TCHF/TCHH).............................. ................................................. 13-33
13.6.4 Mean Number of Blocked Channels.............. ..................................................................... ...........13-34
13.6.5 Mean Number of Idle Channels .......................................................................... ...........................13-35
13.6.6 Mean Number of Busy TCHs (Overlaid Subcell)........... ............................................................... 13-3613.6.7 Mean Number of Busy TCHs (Underlaid Subcell)............ ............................................................ 13-36
13.6.8 Mean Number of Busy Signaling Channels (SDCCH/TCHF/TCHH)........... ................................13-37
13.6.9 Mean Number of Busy TCHs (TCHF/TCHH).............................. ................................................. 13-38
13.7 Channel Assignment Request Measurement per Cell........................................... ...................................13-38
13.7.1 Overview........................................................................................................................................13-38
13.7.2 Channel Assignment Requests in Immediate Assignment Procedure (SDCCH/TCHF/TCHH/TCH)13-
39
13.7.3 Channel Assignment Requests in Assignment Procedure (TCHF/TCHH/TCH) ...........................13-41
13.7.4 Channel Assignment Requests in Internal Intra-Cell Handover Procedure
(SDCCH/TCHF/TCHH/TCH) .................................................................... .............................................. 13-42
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13.7.5 Channel Assignment Requests in Incoming Internal Inter-Cell Handover Procedure
(SDCCH/TCHF/TCHH/TCH) .................................................................... .............................................. 13-43
13.7.6 Channel Assignment Requests in Incoming External Inter-Cell Handover Procedure
(SDCCH/TCHF/TCHH/TCH) .................................................................... .............................................. 13-45
13.7.7 Channel Assignment Requests (SDCCH) ......................................................................... .............13-4613.7.8 Channel Assignment Requests (TCHF) .................................................................. .......................13-47
13.7.9 Channel Assignment Requests (TCHH).........................................................................................13-47
13.7.10 Channel Assignment Requests (TCH) ................................................................. ........................13-48
13.8 Channel Assignment Success Measurement per TRX.............................................................................13-49
13.8.1 Overview........................................................................................................................................13-49
13.8.2 Successful Channel Assignments in Immediate Assignment Procedure (SDCCH/ TCHF/TCHH)13-50
13.8.3 Successful Channel Assignments in Assignment Procedure (TCHF/TCHH) ................................13-51
13.8.4 Successful Channel Assignments in Internal Intra-Cell Handover Procedure (SDCCH/TCHF/TCHH)
..................................................................................................................................................................13-52
13.8.5 Successful Channel Assignments in Incoming Internal Inter-Cell Handover Procedure
(SDCCH/TCHF/TCHH)................................................................... ........................................................ 13-53
13.8.6 Successful Channel Assignments in Incoming External Inter-Cell Handover Procedure (SDCCH/
TCHF/TCHH)...........................................................................................................................................13-54
13.8.7 Successful Channel Assignments (SDCCH)..................................................................................13-55
13.8.8 Successful Channel Assignments (TCHF)................................................................ .....................13-55
13.8.9 Successful Channel Assignments (TCHH) ....................................................................... .............13-56
13.8.10 Successful Channel Assignments (TCH) .......................................................................... ...........13-57
13.9 Channel Assignment Failure Measurement per Cell ...................................................................... .........13-57
13.9.1 Overview........................................................................................................................................13-57
13.9.2 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Immediate
Assignment Procedure (SDCCH) ................................................................... ..........................................13-59
13.9.3 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Immediate
Assignment Procedure (TCHF) ............................................................................ ....................................13-59
13.9.4 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Immediate
Assignment Procedure (TCHH)................................................................................................................13-60
13.9.5 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Assignment
Procedure (TCHF/TCHH) ............................................................... ......................................................... 13-61
13.9.6 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Internal Intra-Cell
Handover Procedure (SDCCH).................................................................................................................13-61
13.9.7 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Internal Intra-CellHandover Procedure (TCHF/TCHH)........................................................................................................13-62
13.9.8 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Incoming Internal
Inter-Cell Handover Procedure (SDCCH) .............................................................. ..................................13-63
13.9.9 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Incoming Internal
Inter-Cell Handover Procedure (TCHF/ TCHH)............................................................... ........................13-64
13.9.10 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Incoming External
Inter-Cell Handover Procedure (SDCCH) .............................................................. ..................................13-65
13.9.11 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Incoming External
Inter-Cell Handover Procedure (TCHF/ TCHH)............................................................... ........................13-65
13.9.12 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) (SDCCH)......... 13-66
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13.9.13 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) (TCHF) ............13-67
13.9.14 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) (TCHH) ...........13-68
13.9.15 Channel Assignment Failures (All Channels Busy or Channels Unconfigured) (TCH) ..............13-69
13.10 Channel Assignment Concentric Cell Measurement per Cell ............................................................... 13-69
13.10.1 Overview......................................................................................................................................13-69
13.10.2 Channel Assignment Requests of Concentric Cell...................................................... .................13-70
13.10.3 TCH Assignment Requests of Concentric Cell .................................................................. ..........13-71
13.10.4 Assignment Requests of Concentric Cell in Incoming Internal Inter-Cell Handover Procedure (TCH)
..................................................................................................................................................................13-72
13.10.5 Channel Assignment Requests in Incoming External Inter-Cell Handover Procedure (TCH).....13-73
13.10.6 Channel Assignment Overflows (TCH) (Underlaid Subcell Preferred or Overlaid Subcell Preferred)
..................................................................................................................................................................13-74
13.10.7 Channel Assignment Overflows in Concentric Cell in Incoming Internal Inter-Cell Handover
Procedure (TCH).......................................................................................................................................13-74
13.10.8 Channel Assignment Overflows in Concentric Cell in Incoming External Inter-Cell Handover
Procedure (TCH).......................................................................................................................................13-75
13.10.9 Channel Assignment Overflows in Concentric Cell (TCH)......................................................... 13-76
13.10.10 Channel Assignment Overflows in Concentric Cell (SDCCH)..................................................13-77
13.10.11 Channel Assignment Overflows in Concentric Cell (TCHF) ..................................................... 13-77
13.10.12 Channel Assignment Overflows in Concentric Cell (TCHH).................................................... 13-78
13.10.13 Failed Handovers from Underlaid Subcell to Overlaid Subcell due to Busy Channels in Overlaid
Subcell .......................................................... ...................................................................... ......................13-79
13.10.14 Failed Handovers from Overlaid Subcell to Underlaid Subcell due to Busy Channels in Underlaid
Subcell .......................................................... ...................................................................... ......................13-79
13.11 Channel Assignment Queue Measurement per Cell ..................................................................... .........13-80
13.11.1 Overview......................................................................................................................................13-80
13.11.2 Maximum Queue Length ................................................................ ............................................. 13-80
13.11.3 Total Queue Length......................................................................................................................13-81
13.11.4 Sampled Queuings .............................................................. ......................................................... 13-81
13.11.5 Total Queuing Duration................................................................................................................13-81
13.11.6 Channel Assignment Queue Measurement................................................................................... 13-82
13.11.7 Mean Queue Length.....................................................................................................................13-83
13.11.8 Mean Queuing Duration...............................................................................................................13-84
13.11.9 Failed Queuings ....................................................... .................................................................... 13-84
13.12 Channel Assignment GPRS Measurement per Cell ..................................................................... .........13-84
13.12.1 Overview......................................................................................................................................13-84
13.12.2 Requests for TCH from the PCU ......................................................................... ........................13-85
13.12.3 Successful TCH Requests from the PCU.....................................................................................13-85
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Figures
Figure 1-1SCCP Measurement..........................................................................................................................1-3
Figure 2-1MTP3 Measurement .............................................................. ........................................................... 2-3
Figure 3-1LAPD link measurement ............................................................. ..................................................... 3-3
Figure 10-1MSC-initiated paging procedure for CS service ........................................................................ ...10-3Figure 10-2SGSN-initiated paging procedure for CS service ...................................................................... ...10-4
Figure 10-3SGSN-initiated paging procedure for PS service..........................................................................10-5
Figure 10-4BSC-delivered CS paging procedure............................................................................................10-6
Figure 10-5CS paging procedure.....................................................................................................................10-7
Figure 10-6PS paging procedure.....................................................................................................................10-8
Figure 11-1Immediate assignment procedure................................................................................................11-46
Figure 11-2trigger points of the counters of Immediate Assignment Commands per Cell............................ 11-48
Figure 11-3Trigger points of the counters of Call Setup Indications................. ............................................ 11-50
Figure 11-4Trigger points of the counters of Rejects to Service Requests per Cell ...................................... 11-52
Figure 11-5Trigger point of the counters of Assignment Requests per Cell..................................................11-58
Figure 11-6Trigger Point of the counters of Assignment Commands per Cell .............................................. 11-59
Figure 11-7Trigger points of the counters of Completed Assignments per Cell............................................ 11-61
Figure 11-8Trigger points of the counters of Mode Modify Commands per Cell ......................................... 11-65
Figure 11-9Trigger points of the counters of Failed Mode Modify Attempts per Cell .................................. 11-67
Figure 11-10Intra-cell handover procedure .................................................................... ............................... 11-71
Figure 11-11Trigger points of the counters of Failed Intra-Cell Handovers per Cell .................................... 11-78
Figure 11-12Incoming internal inter-cell handover.......................................................................................11-89
Figure 11-13Trigger points of the counters of Failed Incoming Internal Inter-Cell Handovers per Cell ......11-96
Figure 11-14Outgoing internal inter-cell handover (excluding directed retry)............................................11-102
Figure 11-15Outgoing internal inter-cell handover (directed retry) ............................................................ 11-104
Figure 11-16Trigger points of the counters of Failed Outgoing Internal Inter-Cell Handovers per Cell
(Excluding Directed Retry) .......................................................... ................................................................ . 11-117
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Figure 11-17Trigger points of the counters of Failed Outgoing Internal Inter-Cell Handovers per Cell (Directed
Retry) .................................................................. .................................................................... ...................... 11-118
Figure 11-18Incoming external inter-cell handover ................................................................... ................. 11-127
Figure 11-19Trigger points of the counters of Failed Incoming External Inter-Cell Handovers per Cell BSC. 11-134
Figure 11-20Outgoing external inter-cell handover (excluding directed retry).............. ............................. 11-141
Figure 11-21Outgoing external inter-cell handover (Directed Retry) ......................................................... 11-143
Figure 11-22Trigger points of Failed Outgoing External Inter-Cell Handovers (Excluding Directed Retry) ...11-
159
Figure 11-23Failed Outgoing External Inter-Cell Handovers (Directed Retry) .......................................... 11-160
Figure 11-24Incoming inter-RAT inter-cell handover procedure ................................................................ 11-171
Figure 11-25Incoming inter-RAT inter-cell handover procedure ......................................................