Observation counter fundamentals411 9001-133.16.07

Global System for Mobile Communications (GSM)

Nortel GSM BSS Performance
Management — Observation
Counters Fundamentals

411-9001-133
.

Document status: Preliminary
Document version: 16.07
Document date: 13 October 2006
Copyright © 2006, Nortel Networks
All Rights Reserved.
Sourced in Canada and France
The information contained in this document is the property of Nortel Networks. Except as speciﬁcally authorized
in writing by Nortel Networks, the holder of this document shall keep the information contained herein conﬁdential
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You may not reproduce, represent, or download through any means, the information contained herein in any way or in
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The following are trademarks of Nortel Networks: *NORTEL NETWORKS, the NORTEL NETWORKS corporate logo,
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All other trademarks are the property of their respective owners

3

Contents
New in this release
Features 7
Other changes 10
Release deltas for V16.0 10
Document restructuring 10
Observation counters terminology 11
Changes in default and configurable observation types
Updates to GSM-R counters 11

7

11

Introduction

13

Chapter 1 Observation counter incrementation principles and
data flow diagrams (DFD)
17
1.1 Radio resource allocation 17
1.1.1 SDCCH (stand-alone dedicated control channel) allocation request 17
1.1.2 TCH (traffic channel) allocation request in primo-allocation 18
1.1.3 TCH allocation request for traffic 18
1.2 Call setup 18
1.2.1 Immediate assignment procedure (normal completion) 19
1.2.2 Immediate assignment procedure with OTDI (normal completion) 22
1.2.3 Paging procedure 23
1.2.4 Immediate assignment procedure (failure cases) 27
1.3 Dedicated channel assignment 54
1.3.1 Nominal procedure 54
1.3.2 MODE MODIFY procedure 60
1.3.3 No resource available and queuing not activated 62
1.3.4 Queuing procedure (successful completion) 63
1.4 Handovers 71
1.4.1 Overview 71
1.4.2 Accounting principles 73
1.4.3 Intra-bts handover procedure 73
1.4.4 Inter cell intra-bss handover procedure (normal completion) 82
1.4.5 Inter-bss handover procedure 91
1.4.6 Directed retry handover procedure 100
1.5 Resource release 102
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Nortel Networks Confidential

4 Contents
1.5.1 Radio channel release 102
1.5.2 Connection release 109
1.6 SMS service 126
1.6.1 SMS established by the MS 127
1.7 GPRS 129
1.7.1 Nominal procedure (in the case of Mobile Originating Call) 129
1.7.2 GPRS procedure: no resource available for a PDTCH preemption 140
1.7.3 GPRS procedure: negative acknowledgement by the PCU for a PDTCH
preemption 143
1.7.4 Counter behavior when GPRS is activated 147
1.8 GPRS/EDGE Suspend and Resume 158
1.8.1 GPRS/EDGE Suspend procedure with RAU message (nominal
procedure) 159
1.8.2 GPRS/EDGE Suspend procedure with RAU message (failure case) 160
1.8.3 GPRS/EDGE Suspend procedure with Resume message (nominal
procedure) 162
1.8.4 GPRS/EDGE Suspend procedure with Resume message (failure
case) 164
1.9 BSC equipment 165
1.9.1 CPUE overload 165
1.10 PCUSN 166
1.10.1 Flow control 166
1.10.2 LLC Discarded 167
1.10.3 UL TBF Establishment: Normal Completion 168
1.10.4 UL TBF Establishment: UL TBF Establishment during DL transfer 170
1.10.5 UL TBF Release: Normal Completion 171
1.10.6 Abnormal UL TBF Release: lossOfComNN0002 173
1.10.7 Abnormal UL TBF Release (FULL Duplex): LossOfComNN0002 175
1.10.8 Abnormal UL TBF Release: N3101 177
1.10.9 Abnormal UL TBF Release (FULL Duplex): N3101 179
1.10.10 Abnormal UL TBF Release: UP_NASSIGNMAX 181
1.10.11 Abnormal UL TBF Release (FULL Duplex): UP_NASSIGNMAX 184
1.10.12 Abnormal UL TBF Release: N3103 187
1.10.13 Abnormal UL TBF Release (FULL Duplex): N3103 188
1.10.14 DL TBF Establishment: MS in Standby State 191
1.10.15 DL TBF Establishment: MS in Ready State 193
1.10.16 DL TBF Establishment during UL transfer 195
1.10.17 DL TBF Release: Normal Completion 197
1.10.18 Abnormal DL TBF Release: lossOfComNN0002 198
1.10.19 Abnormal DL TBF Release (FULL Duplex): lossOfComNN0002 200
1.10.20 Abnormal DL TBF Release: N3105 203
1.10.21 Abnormal DL TBF Release (FULL Duplex): N3105 204
1.10.22 Abnormal DL TBF Release: DN_NASSIGNMAX 206
1.10.23 Abnormal DL TBF Release (FULL Duplex): DN_NASSIGNMAX 208
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Contents 5
1.10.24 Abnormal DL TBF Release: No final PDAN 210
1.10.25 Abnormal DL TBF Release (FULL Duplex): No final Packet Downlink
Ack/Nack (PDAN) 212
1.10.26 Preemption of radio timeslots 214
1.10.27 Cell update: Packet Transfer 216
1.11 Advanced Speech Call Items (ASCI) (GSM-R) 219

Chapter 2 BSS observation management principles
2.1
2.2
2.3
2.4
2.5
2.6

Observation types (OGS, OFS, ORT, ODIAG, temporary)
Observation management 224
Observation counter types (totalizer, value, load) 225
Customized counter names 227
Maximum number of counters 228
Mobility class sensitivity counters 232

223

223

Chapter 3 Counter classes and observation types
3.1 Raw permanent BSS counters default configuration 245
3.1.1 Raw counters configuration (all BSC) 246
3.1.2 Correspondence between BSC 12000 HC and BSC 3000 counters
3.2 Synthetic permanent BSS counters configuration 276
3.2.1 OFS and OGS synthetic counters in standard configuration 276
3.3 Raw Permanent PCUSN Observation Counters 279
3.3.1 PCUSN observation classes 279
3.3.2 PCUSN observation types 281
3.3.3 Throughput counters and satisfaction rate counters 299

245

275

Chapter 4 Counters families

305

Appendix A Monitoring dropped calls with observation
counters

391

A.1 Strategies for using counters 1164/28 and 1164/32 391
A.1.1 Number of communications in traffic phase released: other cases
(1164/28) 391
A.1.2 Number of communications in traffic phase released: TCU failure
(1164/32) 395
A.2 BSC 3000/ TCU 3000 Notifications: triggering alarms with synthetic
counters 398
A.2.1 How to trigger alarms using synthetic counters 398
How to modify alarm severity 399
A.2.2 Examples 400

Appendix B V16 release counters

403

B.1 Delta between 16.0 and 15.0.1 403
B.1.1 BSS counters added since 15.0.1 404
B.1.2 BSS counters removed since 15.0.1 414
B.1.3 BSS counters renamed since 15.0.1 416
B.1.4 PCUSN counters added since 15.0.1 417
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6 Contents
B.1.5 PCUSN counters removed since 15.0.1 418
B.1.6 PCUSN counters renamed since 15.0.1 419
B.1.7 Synthetic counter changes between 15.0.1 and 16.0 419
B.2 Delta between 16.0 and 15.1 419
B.2.1 BSS counters added since 15.1 420
B.2.2 BSS counters removed since 15.1 427
B.2.3 BSS counters renamed since 15.1 428
B.2.4 PCUSN counters added since 15.1 428
B.2.5 PCUSN counters removed since 15.1 429
B.2.6 PCUSN counters renamed since 15.1 430
B.2.7 Synthetic counter changes between 15.1 and 16.0 430
B.3 Delta between 16.0 and 15.1.1 430
B.3.1 BSS counters added since 15.1.1 431
B.3.2 BSS counters removed since 15.1.1 439
B.3.3 BSS counters renamed since 15.1.1 439
B.3.4 PCUSN counters added since 15.1.1 439
B.3.5 PCUSN counters removed since 15.1.1 441
B.3.6 PCUSN counters renamed since 15.1.1 442
B.3.7 Synthetic counters added since 15.1.1 442
B.3.8 Synthetic counters removed since 15.1.1 442
B.3.9 Synthetic counters changed since 15.1.1 442

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7

New in this release
The following sections detail what’s new in the Nortel GSM BSS
Performance Management — Observation Counters Fundamentals,
411-9001-133 for release V16.0.
•

"Features" (page 7)

•

"Other changes" (page 10)

Features
See the following sections for information about feature changes:
•

Class 30/31 mobile support (28855)
— This feature enables the PCUSN to support all the Release 5 mobile
stations that use the High Multislot Classes, as deﬁned in the 3GPP
standards.
— In Chapter 3, "Counters classes and observation types", the section
"PCUSN observation types" is updated to include the new counter
15030/5.

•

EDGE monitoring improvement: performance degradation (27581)
— This feature improves performance monitoring for GPRS/EDGE
in the areas of: effect of the GPRS/EDGE multiplexing on EDGE
DL throughput, GPRS/EDGE DL data blocks conveying GMM/SM
signaling, TBF abnormal releases due to the Suspend procedures,
and partitioning in the UL direction.
"PCUSN observation types" is updated to include the new counters
15255/0, 15258/0, 15259/0, 15260/0, 15278/0, and 15279/0.
Counter 15115/0 has been renamed.

•

Gb Throughput Monitoring – Frame Relay (26933)
— This feature improves performance monitoring on the Gb interface in
order to evaluate the effectiveness of a frame relay network and the
frame relay bandwidth utilization.

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8 New in this release

"PCUSN observation types" is updated to include the new counters
15300/0, 15301/0, 15302/0, 15303/0, 15304/0, 15305/0, 15306/0,
15307/0.
•

MS location (E911) in BSS based configuration (20365)
— This feature implements a BSS-based location services (LCS)
architecture.
— Chapter 3, "Counters classes and observation types", is updated
to include information about the new and updated counters. This
feature adds a new screening for the Lb interface to the counters
1107, 1108, 1109 (1107/1, 1108/1, and 1109/1, respectively) and
creates the new counters 2063/0, 2063/1, 2063/2, 2080, 2081,
2082/0, 2082/1, 2082/2, 2083/0, 2083/1, 2083/2, 2083/3, 2084/0,
2084/1, 2085/0, 2085/1, 2085/2, 2086/0, 2086/1, 2086/2, 2087/0,
2087/1, 2087/2, 2088/0, 2088/1, 2088/2.

•

Network Assisted Cell Change for release 4 MS (22859)
— This feature implements improvements reduce the duration of cell
re-selection through improvements to the cell change notification
process in combination with network-assisted System Identification.
"PCUSN observation types" is updated to include the counters
15256, 15257.

•

Packet Flow Context: GPRS/EDGE QoS Management Improvement
(22860)
— This feature describes a packet flow context (PFC) which implements
a quality of service (QoS) architecture within the GSM access
network; it replaces the Release 97 QoS implementation from BSS
V14.
15263/0, 15264/0, 15265/0, 15266/0, 15267/0, 15268/0, 15269/0,
15270/0, 15271/0, 15272/0, 15274/0, 15276/0

•

PCUSN LLC re-routing (26860)
— This feature allows the SGSN to transfer LLC-PDUs from the old cell
to the new cell when a mobile station undergoes a cell change from
one cell to another in the same routing area.
15261/0 and 15262/0.

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Features 9

•

QOS R97 End-of-Life (28817)
— This feature removes from the BSS the Nortel Rel,. 97 QoS
functionality introduced in V14. Rel. 97 QoS is replaced by the
QoS architecture introduced by the feature "Packet Flow Context:
GPRS/EDGE QoS Management Improvement (22860)."
— The following counters are deleted: 15029/1, 15029/2, 15029/3,
15029/4, 15077/0, 15077/1, 15077/2, 15077/3, 15078/0, 15078/1,
15078/2, 15078/3, 15079/0, 15079/1, 15079/2, 15079/3, 15031/4,
15034/1, 15062/2, 15060/1, 15061/1, 15062/3, 15062/4, and
15062/5.

•

RACH 7F filter at the BTS (32648)
— This feature establishes a filter for the RACH that makes the BTS
ignore request messages with an establishment cause code of 7F.
The existing PCU counters no longer peg for the arrival of messages
with code 7F, and a new counter is created specifically for tracking
the number of decoded random access received by the BTS from
the MS with the value 7F.
— In Chapter 3, "Counters classes and observation types", applicable
sections are updated to include the new counter 1615.

•

SAIC MS management Itf change V16 (29045)
— This feature provides support for mobile stations that use Single
Antenna Interference Cancellation (DARP phase I).
sections are updated to include the counter 2097.

•

TDMA Based Counters (15405)
— This feature allows for the collection of performance data at the
TDMA level which previously was available only on the level of
TDMA class or cell.
— In Chapter 2, "BSS Observation Management Principles", Section
2.6, "Mobility class sensitivity counters" is updated to reflect the new
TDMA counters. Chapter 3, "Counters classes and observation
types," is updated to include the new counters that report on
performance data at the TDMA level. Information is added for new
counters 1173, 1174, 1830–1833, 1844–1847, 1855, 1856, 1968,
1969, 2097, 2100–2125, 2138–2144, 2150–2161, 2165, 2166, 2167,
2170, and 2171. The table "Raw counters configuration (all BSC)" is
also updated with all new counters introduced in this feature.

•

Tx Power Offset for Signalling Channels (30293)

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— This feature implements a power offset (above the Tx power
applicable for speech) to transmit the signalling bursts, which
increases the robustness of the signalling channels (FACCH and
SACCH) in the downlink direction.
sections are updated to include the new counters 1839/10, 1839/11,
1839/12, 1839/13, 1840/10, 1840/11, 1840/12, 1840/13, 2188/0,
and 2189/0.

Other changes
See the following sections for information about changes that are not
feature-related:

Release deltas for V16.0
A comprehensive summary of observation counter changes (counters
added, deleted, or modified) between V16.0 and previous releases is
provided in the appendix, V16 release counters.

Document restructuring
The existing counters reference document, BSS Observation Counters
Dictionary, 411-9001-125, has been split into four separate documents:
•

This document (Nortel GSM BSS Performance Management —
Observation Counters Fundamentals, 411-9001-133) contains all other
reference information previously contained in the 411-9001-125.

The counter definitions are now distributed among three documents,
organizing counters by network node and counter family. There are now
separate documents for counters measured at the OMC-R and PCUSN.
Within the observation counters dictionary, counters are now arranged into
chapters according to counter family.
•

Nortel GSM BSS Performance Management — Observation Counters
Dictionary, 411-9001-125, contains formal definitions for each
observation counter reported to the OMC-R by the BSC (including
counters measured at the BTS).

•

Nortel GSM PCUSN Performance Management — Observation
Counters Dictionary, 411-9001-211, contains formal definitions for each
observation counter measured at the PCUSN.

•

Nortel GSM OMC-R Performance Management — Observation
observation counter measured at the OMC-R.

For more help with finding information about observation counters, see the
"Introduction" chapter of this document.

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Other changes

11

Observation counters terminology
Beginning in V16, this document redefines the terms family and type for
greater consistency with the way in which counters are used and presented
at the OMC-R.
•

The category formerly called class has been renamed family. It
indicates a related group of counters that describe events that reflect
a common subset of GSM functionality, for example AMR or Inter-BSS
handovers. The families have been redefined for better consistency
with the OMC-R GUI.

•

The category formerly called type has been renamed class. This field
specifies whether the counter is permanent or temporary, and whether
the counter is raw or synthetic.

Now that counters are organized by counter family in the observation
counter dictionaries, the tables of counters by counter family have been
removed from Chapter 3, "Counter class and observation types." This NTP
now contains a new Chapter 4, "Counter families." This chapter consists of
a table that allows the reader to find the counter family that an observation
counter belongs to, and to identify the NTP that contains the dictionary
entry for that counter.

Changes in default and configurable observation types
Effective in V16, the following counters are part of the ORT observation
group: 1747, 1747, and 1829.
Effective in V16, the following counters can be configured in the OGS
observation group, but for the BSC 3000 only: 1839 (all screenings), 1840
(all screenings). The section, "Raw counters configuration (all BSC)," is
updated accordingly.

Updates to GSM-R counters
In Chapter 2, "BSS Observation Management Principles", Section 2.6,
"Mobility class sensitivity counters" is updated to reflect the new TDMA
counters, and a new table lists counters applicable to 8W mobiles.

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13

Introduction
This document, Nortel GSM BSS Performance Management — Observation
Counters Fundamentals, provides a formal description all observation
counters from the GSM access network that are under the management of
the OMC-R. This document also explains how to understand the observation
counters in the context of the observation management framework of the
OMC-R and how observation counters relate to different GSM call ﬂow
scenarios.
Unless otherwise indicated, this information applies to:
•

Operating environments: GSM access network, GSM access network
for railways (GSM-R access)

Prerequisites
•

Nortel GSM BSS Overview, 411-9001-001

•

Nortel GSM BSS Fundamentals — Operating Principles, 411-9001-007

•

"Locating a BSS observation counter" (page 14)

•

Chapter 1 "Observation counter incrementation principles and data ﬂow
diagrams (DFD)" (page 17)

•

Chapter 2 "BSS observation management principles" (page 223)

•

Chapter 3 "Counter classes and observation types" (page 245)

•

Appendix "Monitoring dropped calls with observation counters" (page
391)

•

Appendix "V16 release counters" (page 403)

Navigation

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14 Introduction

Locating a BSS observation counter
The observation counters are documented in three separate observation
counter dictionaries, according to the network node that reports the counter
to the OMC-R.
•

Nortel GSM BSS Performance Management — Observation Counters
Dictionary, 411-9001-125, contains formal deﬁnitions for each
observation counter reported to the OMC-R by the BSC (including
counters measured at the BTS).

•

Nortel GSM PCUSN Performance Management — Observation

•

Nortel GSM OMC-R Performance Management — Observation

The following ﬁgure provides the user with guidelines for locating a BSS
observation counter in the correct dictionary of counters.

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Locating a BSS observation counter

15

Guidelines for locating a BSS observation counter

Locating a counter by counter number
Use the following table to identify which NTP to use to locate the deﬁnition
of the counter when the counter number is known, but the counter name is
not known.
If the counter is in this range

Look for it in this NTP

1000 to 7999

411-9001-125

8000 to 9999

411-9001-125 (synthetic counters)

15000 to 15999

411-9001-211

60000 and up

411-9001-212

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16 Introduction

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17

Chapter 1
Observation counter incrementation
principles and data ﬂow diagrams (DFD)
1.1 Radio resource allocation
1.1.1 SDCCH (stand-alone dedicated control channel) allocation request

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18 Chapter 1 Observation counter incrementation principles and data flow diagrams (DFD)

1.1.2 TCH (traffic channel) allocation request in primo-allocation

1.1.3 TCH allocation request for traffic

1.2 Call setup
Call setup is initiated by the mobiles (Mobile Originating Call setup) or the
MSC (Mobile Terminating Call setup).

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1.2 Call setup 19

In the second case, a paging procedure precedes the immediate assignment
procedure.

1.2.1 Immediate assignment procedure (normal completion)
Data Flow Diagram: immediate assignment procedure (normal completion)

(1) The following counters are incremented depending on the cause value in
the CHANNEL REQUIRED message:
•

1191 cause 000

•

1191/1 and 1730 for cause 001

•

1191/2 for cause 010

•


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•

1191/4 and 1730 for cause 100

•


•


•


(2) If no SDCCH is available, the base station controller (BSC) may try to
allocate a TCH in signaling mode. In this case, the following counters are
incremented: 1744, 1746, 1609/2, 1611/2
List of the counters incremented during this procedure:
Counter
number

Counter name

Function

1104/0

sccpAllocated

number of connections of the
signalling connection control
part (SCCP) for the subsystem
number (SSN) of the base
station subsystem management
application part (BSSMAP) in the
BSC

1105

sccpAveragedUsedMoy/
Max/Cum/Ech

average number of SCCP
connections established

1107

aInputMessage

number of messages in the base
station system application part
(BSSAP) received by the BSC

1108

aOutputMessage

number of BSSAP messages sent
by the BSC

1191/n
[n= 0 to 7]

channelRequestCause
Xxx

number of channel allocation
requests: Cause xxx

1192/n
[n= 0 to 7]

immediateAssignment
SuccessCauseXxx

number of successful immediate
assignments: Cause xxx

1193/n
[n= 0 to 3]

estabIndicSignalling
CauseXxx

number of ESTABLISH
INDICATION messages in
establishment phase received for
mobile originating calls: Cause
xxx

1195

estabIndicSigPhaseI

number of ESTABLISH
Phase I mobiles

1196

estabIndicSigPhaseII

number of ESTABLISH
Phase I mobiles

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1.2 Call setup 21

Counter
number

Function

Counter name

1500

aTransparentUp

number of messages for the direct
transfer application part (DTAP)
sent by the BSC to the MSC

1501

aTransparentDown

number of DTAP messages
received

1502

aNonTransparentUp

number of BSSMAP messages
sent by the BSC

1606

sdcchAllocatedTrZone

number of SDCCH allocated in
the zone (concentric cell)

1607

sdcchAveragedUsedTr
ZoneMoy/Max/Cum/Ech

average number of SDCCHs used
in the inner or outer zone of the
cell

1609/2

tchFrAllocatedOverflow
AllocationTrZone

number of full rate traffic channels
(TCH/FR) allocated in the inner or
outer zone of the cell because of
SDCCH unavailability

1611/2

tchFrAveragedUsedOver
flow
AllocationTrZoneMoy/Ma
x/Cum/Ech

average and maximum number
of TCH/FR used in the inner or

1629/0

channelActivateSignal
lingFullRate

number of Full Rate channels
activated for signaling

1702

channelRequest
Extended

number of receipt of CHANNEL
REQUIRED message with a
timing advance greater than 63

1730

pagingResponse

number of responses to paging
requests in the cell

1744

tchFrAllocated

number of TCH/FR or preempted
packet data traffic channels
(PDTCH) allocated in the cell

or

or

tchFrAllocatedTrZone

PDTCH allocated in the inner or
outer zone of the concentric cell

tchFrAveragedUsedMoy/
Max/Cum/Ech

average number of TCH/FR or
preempted PDTCH used in the
cell

or

or

tchFrAveragedUsed
TrZoneMoy/Max/Cum/Ec
h

inner or outer zone of the cell

1746

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Counter
number

Counter name

Function

1748

channelRequest

requests

1749

immediateAssignmentSu
ccess

assignments

1750


number of ESTABLISH
establishment phase received

1.2.2 Immediate assignment procedure with OTDI (normal completion)
This procedure used to establish group calls (voice call services, VCS,
or voice group call services, VGCS) includes Originator To Dispatcher
Information (OTDI) in the setup message.

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1.2 Call setup 23

1.2.3 Paging procedure
Data Flow Diagram: immediate assignment: paging procedure (normal
completion)

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•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


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1.2 Call setup 25

(2) If no SDCCH is available, the BSC may try to allocate a TCH in signaling
mode. In this case, the following counters are incremented:
•

1744, 1746, 1609/2, 1611/2

Counter
number

Counter name

Function

1104/0

sccpAllocated

number of SCCP connections for
SSN BSSMAP in the BSC

1105

Max/Cum/Ech


1107

aInputMessage

number of BSSAP messages
received by the BSC

1108

aOutputMessage

by the BSC

1191/n
[n= 0 to 7]

channelRequestCause
Xxx

requests: Cause xxx

1192/n
[n= 0 to 7]

immediateAssignment
SuccessCauseXxx


1193/n
[n= 0 to 3]

CauseXxx

number of ESTABLISH
xxx

1195

estabIndicSigPhaseI

number of ESTABLISH
Phase I mobiles

1196


number of ESTABLISH
Phase II mobiles

1500

aTransparentUp

sent by the BSC to the mobile
switching center (MSC)

1501

aTransparentDown

received

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

received by the BSC from the
MSC

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Counter
number

Function

Counter name

1606



1607

sdcchAveragedUsed
h

cell

1609/2

AllocationTrZone

number of TCH/FR allocated in
the inner or outer zone of the cell
because of SDCCH unavailability

1611/2

TchFrAveragedUsed
OverflowAllocationTrZon
eMoy/Max/Cum/Ech


1629/0

channelActivateSignal
lingFullRate


1702

channelRequest
Extended


1730

pagingResponse


1744

tchFrAllocated

PDTCH allocated in the cell

or

or



Max/Cum/Ech

cell

or

or

tchFrAveragedUsed
h


1748

channelRequest

requests

1749

immediateAssignment
Success

assignments

1750


number of ESTABLISH

1746

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1.2 Call setup 27

1.2.4 Immediate assignment procedure (failure cases)
1.2.4.1 No resource available (SDCCH)

Counter name

Function

1161/1

immediateAssignmentRej
ect
RadioRes

number of immediate assignments
rejected for lack of radio resources

1191/0

channelRequestCause00
0

requests: Cause 000

1608

sdcchResourceFailure
TrZone

number of SDCCH allocation
failures due to lack of SDCCH in
the inner and outer zone of the cell

1748

channelRequest

requests

1751

immediateAssignment
Reject

rejected

Counter
number

1.2.4.2 Negative reponse from the BTS
Data Flow Diagram: immediate assignment failure procedure: negative
response from base-station transceiver station (BTS)

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•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


•

1744, 1746, 1609/2, 1611/2

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1.2 Call setup 29

Counter
number

Function

Counter name

1161/2

immediateAssignment
RejectChanActNack

rejected because a CHANNEL
ACTIVATE NACK message is
received

1191/n
[n= 0 to 7]

channelRequestCause
Xxx

requests: Cause xxx

1606


number of SDCCH allocation in

1607

sdcchAverageUsed
h

of SDCCHs used in the inner or
outer zone of the cell

1609/2

AllocationTrZone


1611/2

tchFrAveragedUsed
e Moy/Max/Cum/Ech

SDCCH unavailability, obtained
through internal sampling

1629/0

channelActivate
SignallingFullRate

(SDCCH or TCH/FR) activated for
signaling in the cell

1702

channelRequest
Extended


1730

pagingResponse


1744

tchFrAllocated

the cell

or

or


the inner or outer zone of the
concentric cell

Max/Cum/Ech

average number of TCH/FR used
concentric cell

1746

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Counter
number

Function

Counter name

1748

channelRequest

requests

1751

immediateAssignment
Reject

rejected

1.2.4.3 No response to CHANNEL ACTIVATE
Data Flow Diagram: immediate assignment failure procedure: no response
to CHANNEL ACTIVATE

•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


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1.2 Call setup 31

•

1744, 1746, 1609/2, 1611/2

Counter
number

Function

Counter name

1161/3

immediateAssignment
RejectChanActTimmack

rejected because of TimmAck
time-out elapse

1191/n
[n= 0 to 7]

channelRequestCause
Xxx

requests: Cause xxx

1606



1607

sdcchAverageUsed
h


1609/2

AllocationTrZone


1611/2

tchFrAveragedUsed
e Moy/Max/Cum/Ech


1629/0

channelActivate
SignallingFullRate


1702

channelRequest
Extended


1744

tchFrAllocated

the cell

or

or


concentric cell

Max/Cum/Ech

concentric cell

1746

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Counter
number

Counter name

Function

1748

channelRequest

requests

1751

immediateAssignment
Reject

rejected

1.2.4.4 Incorrect ﬁrst L3 message
Data Flow Diagram: immediate assignment failure procedure: timer T3101
expiry

•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


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1.2 Call setup 33

•


•

1744, 1746, 1609/2, 1611/2

Counter
number

Function

Counter name

1161/3

immediateAssignment
RejectChanActTimmack

rejected because of TimmAck
time-out elapse

1191/n
[n= 0 to 7]

channelRequestCause
Xxx

requests: Cause xxx

1192/n
[n= 0 to 7]

immediateAssignment
SuccessCauseXxx

with cause xxx satisfied

1606



1607

sdcchAverageUsed
h


1609/2

AllocationTrZone


1611/2

tchFrAveragedUsed
e Moy/Max/Cum/Ech


1629/0

channelActivate
SignallingFullRate


1702

channelRequest
Extended


1744

tchFrAllocated

the cell

or

or


concentric cell

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Counter name

Function

1746

Max/Cum/Ech

concentric cell

1748

channelRequest

requests

1749

immediateAssignment
Success

satisfied

Counter
number

1.2.4.5 Timer 3101 expiry
Data Flow Diagram: immediate assignment failure procedure: incorrect
ﬁrst L3 message

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1.2 Call setup 35

(1) The following counters are incremented or decremented depending on
the cause value in the CHANNEL REQUIRED message:
•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


•

1744, 1746, 1609/2, 1611/2

List of the counters incremented or decremented during this procedure:
Counter name

Function

1163/4

signallingReleaseBtsIncF
irstL3

number of communications in
signaling phase release because
of incorrect First L3 message
when a cell is associated with the
communication

1191/n
[n= 0 to 7]

channelRequestCausexx
x

requests: Cause xxx

1192/n
[n= 0 to 7]

ccessCausexxx

with cause xxx satisfied

1606



1607

sdcchAverageUsedTrZon
eMoy/Max/Cum/Ech


1609/2

tchFrAllocatedOverflowAl
locationTrZone


1611/2

tchFrAveragedUsedOv
erflowAllocationTrZone
Moy/Max/Cum/Ech


Counter
number

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Counter
number

Function

Counter name

1629/0

channelActivateSignallin
gFullRate


1702

channelRequestExtende
d


1744

tchFrAllocated

the cell

or

or
concentric cell

1746

Max/Cum/Ech

concentric cell

1748

channelRequest

requests

1749

ccess

satisfied

1753

signallingReleaseBts

number of releases while the
communication is in "signaling
phase" and a cell associated to
the communication

1778

signallingAbnormalRelea
seCell

number of abnormal releases
while the communication is in
"signaling phase" and a cell
associated to the communication

1.2.4.6 Trafﬁc with the MSC close
Data Flow Diagram: immediate assignment failure procedure: trafﬁc with
the MSC closed

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1.2 Call setup 37

Counter name

Function

1161/0

ectTraffMsc

rejected because the traffic with
the MSC is interrupted

1191/0

channelRequestCause00
0

requests: Cause 000

1608

sdcchResourceFailureTr
Zone

number of SDCCH allocation
failures due to lack of SDCCH in

1748

channelRequest

requests

1751

ect

rejected

Counter
number

1.2.4.7 CONNECTION FAILURE indication
Data Flow Diagram: immediate assignment failure procedure: connection
failure indication

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411-9001-133 16.07 Preliminary
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1.2 Call setup 39

•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


•

1744, 1746, 1609/2, 1611/2

Counter
number
1044

Counter name
signallingPhaseDuration
Moy/Max/Cum/Ech

Function
average and maximum seizure
of signaling channels expressed
in milliseconds, calculated on all
allocations lasting more than 25
milliseconds

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.



Counter
number

Counter name

Function

1045

HighMoy/Max/Cum/Ech

allocations in the cell

1104/0

sccpAllocated


1105

Max/Cum/Ech


1107

aInputMessage

received by the BSC

1108

aOutputMessage

by the BSC

1191/n [n= 0
to 7]

channelRequestCauseX
xx

requests: Cause xxx

1192/n [n= 0
to 7]

ccessCauseXxx


1193/n [n= 0
to 3]

estabIndicSignallingCau
seXxx

number of ESTABLISH
Xxx

1195

estabIndicSigPhaseI

number of ESTABLISH
Phase I mobiles

1196


number of ESTABLISH
Phase II mobiles

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

sent by the MSC

1606



1607

sdcchAveragedUsedTrZo
neMoy/Max/Cum/Ech

cell

1609/2

locationTrZone


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1.2 Call setup 41

Counter name

Function

1611/2

tchFrAveragedUsedOverf
lowAllocationTrZoneMoy/
Max/Cum/Ech


1629/0

gFullRate


1702

channelRequestExtende
d


1730

pagingResponse


1744

tchFrAllocated

number of TCH/Fr or preempted

Counter
number

or

or
1746

Max/Cum/Ech

cell

or
or
tchFrAveragedUsedTrZo
neMoy/Max/Cum/Ech


1748

ChannelRequest

requests

1749

ImmediateAssignmentSu
ccess

assignments

1750

EstabIndicSignalling

number of ESTABLISH

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Counter
number

Counter name

Function

1753


the communication

1778

seCell

"signaling phase" and a cell

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1.2 Call setup 43

1.2.4.8 ERROR indication (connection failure)

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.



•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


•

1744, 1746, 1609/2, 1611/2

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1.2 Call setup 45

(3) ASCI counters are optional since they are related to the functionality of
the Global System for Mobility, railways application (GSM-R).
Counter
number

Counter name

Function

1044

Moy/Max/Cum/Ech

milliseconds

1045

HighMoy/Max/Cum/Ech


1104/0

sccpAllocated


1105

Max/Cum/Ech


1107

aInputMessage

received by the BSC

1108

aOutputMessage

by the BSC

1163/18

signallingReleaseBtsErro
rIndDm

number of communications
in signaling phase released
because of DM frames received
in established multiframe mode
when a cell is associated to the
communication

1191/n
[n= 0 to 7]

xx

requests: Cause xxx

1192/n
[n= 0 to 7]

ccessCauseXxx


1193/n
[n= 0 to 3]

seXxx

number of ESTABLISH
Xxx

1195

estabIndicSigPhaseI

number of ESTABLISH
Phase I mobiles

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.



Counter
number

Function

Counter name

1196


number of ESTABLISH
Phase II mobiles

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

sent by the MSC

1601

downlinkPowerCtrlMaxS
dcchMoy/Max/Cum/Ech

duration of maximum downlink
power use on busy SDCCHs

1602

uplinkPowerCtrlMaxSdcc
hMoy/Max/Cum/Ech

duration of maximum uplink power
use on busy SDCCHs

1603

connectionDurationSdcc
hMoy/ Max/Cum/Ech

connection duration of SDCCHs
(concentric cell)

or

or

connectionDurat
ionSdcchTrZone
Moy/Max/Cum/Ech

(non-concentric cell)

1606


number of SDCCHs allocated in

1607

neMoy/Max/Cum/Ech

cell

1609/2

locationTrZone


1611/2

tchFrAveragedUsedOv
erflowAllocationTrZone
Moy/Max/Cum/Ech


1622

msLostMeasurements

number of measurement
messages of the mobile station
(MS) not received by the cell

or

or
msLostMeasurementsTr
Zone

number of MS measurement
messages not received by the

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1.2 Call setup 47

Counter
number
1623

Function

Counter name
rxLevDownLink
or

sum of downlink signal strength
measurements received on the
cell
or

rxLevDownLinkTrZone
1624

rxLevUpLink
or

sum of uplink signal strength
cell
or

rxLevUpLinkTrZone
1625

rxQualDownLink

sum of downlink signal quality
measurements on the cell

or
or
rxQualDownLinkTrZone

1626

measurements on the inner or

rxQualUpLink

sum of uplink signal quality

or
or
rxQualUpLinkTrZone
1744

tchFrAllocated


or

or



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Counter
number
1746

Function

Counter name
Max/ Cum/Ech

cell

or
or
neMo y/Max/Cum/Ech


1748

ChannelRequest

requests

1749

ccess

assignments

1750


number of ESTABLISH

1753


communication is in "signalling
the communication

1778

seCell

"signalling phase" and a cell

1805

msPowerIncControl

number of MS increment power
controls ordered by the Layer 1
management

1806

msPowerDecControl

number of MS decrement power
management

1807

bsPowerIncControl

number of BS increment power
management

1808

bsPowerDecControl

number of BS decrement power
management

1.2.4.9 Rejection from the MSC
Data Flow Diagram: immediate assignment failure procedure: rejection
from the MSC

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1.2 Call setup 49

411-9001-133 16.07 Preliminary
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.



•


•

1191/1 and 1730 for cause 001

•


•


•

1191/4 and 1730 for cause 100

•


•


•


•

1744, 1746, 1609/2, 1611/2

(3) DTAP service is now open
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.


1.2 Call setup 51

(4) ASCI counters are optional since they are related to the GSM-R
functionality.
Counter
number

Counter name

Function

1044

Moy/Max/Cum/Ech

milliseconds

1045

HighMoy/Max/Cum/Ech


1104/0

sccpAllocated


1105

Max/Cum/Ech


1107

aInputMessage

received by the BSC

1108

aOutputMessage

by the BSC

1163/20

signallingReleaseBtsCle
arCommand

number of communications in
signaling phase released because
of CLEAR COMMAND received
when a cell is associated to the
communication

1191/n
[n= 0 to 7]

xx

requests: Cause xxx

1192/n
[n= 0 to 7]

ccessCauseXxx


1193/n
[n= 0 to 3]

seXxx

number of ESTABLISH
Xxx

1195

estabIndicSigPhaseI

number of ESTABLISH
Phase I mobiles

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.



Counter
number

Function

Counter name

1196


number of ESTABLISH
Phase II mobiles

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

sent by the MSC

1601

dcchMoy/Max/Cum/Ech


1602

hMoy/Max/Cum/Ech

use on busy SDCCHs

1603

hMoy/ Max/Cum/Ech

(concentric cell)

or

or

connectionDura
tionSdcchTrZo
neMoy/Max/Cum/Ech


1606


number of SDCCHs allocated in

1607

neMoy/Max/Cum/Ech

cell

1609/2

locationTrZone


1611/2

tchFrAveragedUsedOverf
lowAllocationTrZoneMoy/
Max/Cum/Ech


1622

msLostMeasurements

messages not received by the cell

or
or
Zone

messages not received by the

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1.2 Call setup 53

Counter
number
1623

Function

Counter name
rxLevDownLink
or
rxLevDownLinkTrZone

cell
or

1624

rxLevUpLink
or
rxLevUpLinkTrZone

cell
or

1625


or

or


1626

rxQualDownLink


rxQualUpLink


or
or
rxQualUpLinkTrZone
1744

tchFrAllocated


or

or



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.



Counter
number
1746

Function

Counter name
Max/ Cum/Ech

cell

or

or

neMoy/ Max/Cum/Ech


1748

ChannelRequest

requests

1749

ccess

assignments

1750


number of ESTABLISH

1753


the communication

1.3 Dedicated channel assignment
Dedicated channel assignment procedures are used to modify previous
radio channel assignments.

1.3.1 Nominal procedure
This procedure is used to modify a channel type (change from SDCCH to
TCH or change of transmission mode) or to process handover requests.
Data Flow Diagram: dedicated channel assignment procedure (a MS
switching from an SDCCH to a TCH for service).

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.



55

(1) When a TCH resource is successfully allocated internally in the BSC
software, the following counters are incremented:
•

1609/0 tchFrAllocatedTchAllocation (number of TCH/FR allocated for
trafﬁc in the inner or outer zone of the cell)

•

1611/0 tchFrAveragedUsedTchAllocationMoy/Max/Cum/Ech (average
number of TCH/FR used for trafﬁc in the inner or outer zone of the cell)

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.



•

1812 allocatedCircuitTsMoy/Max/Cum/Ech (number of time
slot, or TS, allocations for trafﬁc on circuit mode in the cell or
allocatedCircuitTsTrZoneMoy/Max/Cum/Ech (number of TS allocations
for trafﬁc on circuit mode in the inner or the outer of the cell

(2) The counter incremented depends on the channel mode used (speech
or data):
•

either 1197/0 (FR) or 1197/1 (enhanced full rate, EFR) for speech

•

or 1709 and 1705/n (n=0 to 6) for transparent data

•

or 1710 and 1707/n (n=0 to 2) for non-transparent data

(3) When the ASSIGNMENT_COMMAND message is received, 1049
attemptedTchFrSeizures (number of TCH/FR assignment requests)
is incremented and, if the MS is the dualband type, 1715 attempted
TchFrSeizuresMsDualdb is also incremented.
(4) When the STOP_MEASUREMENT message for the SDCCH channel is
received, if the BTS reports measurement counters, the BSC increments
1601, 1602, 1603, 1622, 1623, 1624, 1625, 1626, 1804, 1805, 1806, 1807
and 1808.
(5) The old (SDCCH) channel is released. 1050 successfulTchFrSeizures
is incremented and, if the MS is the dualband type, 1716
successfulTchFrSeizuresMsDualb is also incremented.
(6) When the old (SDCCH) channel has been released, 1607 counting the
average number of SDCCH used in the inner or outer zone of the cell
is decremented.
List of counters incremented or decremented during this procedure:
Counter
number

Counter name

Function

1044

Moy/Max/Cum/Ech

average time of a signaling
channel seizure

1045

HighMoy/Max/Cum/Ech

channel seizure > 25s

1049

attempedTchFrSeizures

number of TCH/FR assignment
requests

1050

successfulTchFrSeizures

number of TCH/FR successfully
assigned

1094

tcAllocated

number of terrestrial circuits
allocated

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.



Counter
number

57

Function

Counter name

1095

tcAveragedUsedMoy/Ma
x/Cum//Ech

average number of terrestrial
circuits used

1107

aInputMessage

received by the BSC

1108

aOutputMessage

by the BSC

1197/0

channelActivateSpeechF
ullRate

number of channels activated for
speech: Full Rate algorithm

1197/1

channelActivateSpeechE
nhancedFullRate

number of channels activated
for speech: Enhanced Full Rate
algorithm

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

received by the BSC

1601

dcchMoy/Max/Cum/Ech


1602

hMoy/Max/Cum/Ech

use on busy SDCCHs

1603

hMoy/Max/Cum/Ech

(concentric cell)

or

or

hTrZoneMoy/Max/Cum/E
ch


1607

neMoy/Max/Cum/Ech

cell

1609/0

tchFrAllocatedTchAllocati
onTrZone

PDTCH allocated for traffic in the
inner of outer zone of the cell

1611/0

tchFrAveragedUsedTchA
llocation TrZoneMoy/Max
/Cum/Ech

preempted PDTCH used for traffic
cell

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.



Counter
number
1622

Function

Counter name
msLostMeasurements
or
Zone

messages not received
or
(concentric cell)

1623

rxLevDownLink
or
rxLevDownLinkTrZone

measurements received (nonconcentric cell)
or
measurements received
(concentric cell)

1624

rxLevUpLink
or
rxLevUpLinkTrZone

measurements received (nonconcentric cell)
or
(concentric cell)

1625

rxQualDownLink

measurements (concentric cell)

or
or
measurements (non-concentric
cell)

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.



Counter
number
1626

Function

Counter name
rxQualUpLink
or
rxQualUpLinkTrZone

59

measurements (non-concentric
cell)
or
measurements (concentric cell)

1629/0

gFullRate

number of Full-Rate channels

1629/1

gEnhancedFullRate

number of Enhanced-Full-Rate
channels activated for signaling

1705/n (n = 0
to 6)

channelActivateTchFrDat
aTx (x = 16 to 14400 b/s)

number of TCH/FR activation for
transparent data service with a
transmission rate = x

1707/n (n = 0
to 2)

channelActivateTchFrDat
aNTx (x = 6 to 14500 b/s)

number of TCH/FR activation for
non transparent data service with
a transmission rate = x

1710

channelActivateTchFrND
ataNTHscsd

number of channel activation for
non transparent data service on
TCH/FR

1715

attemptedTchFrSeizures
MsDualb

number of attempts of assignation
of a TCH/FR for dualband mobiles

1716

MsDualb

number of successful TCH/FR
assignations for dualband mobiles

1717

abisTrauFrameDlReceiv
ed

number of frames TRAU
(transcoder and rate adaptation
unit) downlink received

1718

abisTrauFrameDlCorrect
ed

number of frames TRAU downlink
corrected

1719

abisTrauFrameDlMuted

number of frames TRAU downlink
that can not be corrected

1720

radioFrameUlReceived

number of radio frames uplink
received

1721

ECU_Activation

number of erroneous frames
(error concealment unit, or ECU,
may be activated or not)

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.



Counter
number
1744

Function

Counter name
tchFrAllocated


or
or

1746

Max/Cum/Ech

cell

or
or
neMoy/ Max/Cum/Ech

1812

allocatedCircuitTsMoy


number of TS allocations for traffic
in circuit mode in the cell

or
or
allocatedCircuitTsTrZone
Moy

1841/0

assignRequestSdcchToT
chChannel

number of TS allocations for traffic
in circuit mode in the inner or the

number of assignment request
messages received: modification
from an SDCCH channel to a TCH
channel

1.3.2 MODE MODIFY procedure
This procedure is used to modify the coding/decoding/transcoding mode on
the dedicated cell channels used for sending speech or data.
It is also used when the MS initiates a call re-establishment request. In this
case, the BSC allocates a TCH for signaling and may use this particular
procedure to accomplish the transition from signaling to speech mode rather
than the general procedure which is much longer.
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61

Counter
number

Counter name

Function

1044

Moy/Max/Cum/Ech

channel seizure

1045

HighMoy/Max/Cum/Ech


1094

tcAllocated

allocated

1095

tcAveragedUsedMoy/Ma
x/Cum/Ech

circuits used

1107

aInputMessage

received by the BSC

1108

aOutputMessage

by the BSC

1197/0

channelActivateSpeechF
ullRate

number of channels activated for
speech: Full Rate algorithm

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Counter
number

Function

Counter name

1502

aNonTransparentUp

sent by the BSC

1503

aNonTransparentDown

received by the BSC

1841/0

assignRequestSdcchToT
chChannel

number of assignment request
messages received: modification
from an SDCCH channel to a TCH
channel

1.3.3 No resource available and queuing not activated
The terrestrial circuit allocation is engaged before the radio resource
allocation. If the radio resource allocation fails because of radio resource
shortage, the TCH-FR-RESOURCE-FAILURE observation point is
incremented.
The cause value is one of the following:
•

"BSS not equipped"

•

"requested terrestrial resource unavailable"

•

"terrestrial resource already allocated"

•

"no radio resource available"

Data Flow Diagram: dedicated channel assignment procedure (no resource
available and queuing not activated).

(1) Downlink DTAP service is suspended.
(2) The Terrestrial Circuit is allocated before sending a request to allocator.
(3) The request for a radio resource is rejected.
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63

(4) The Terrestrial Circuit is deallocated before sending an
ASSIGNMENT_FAILURE message.
(5) Downlink DTAP service is resumed.
Counter
number

Function

Counter name

1094

tcAllocated

allocated

1095

tcAveragedUsedMoy/Max/C
um//Ech

circuits used

1107

aInputMessage

received by the BSC

1108

aOutputMessage

sent by the BSC

1502

aNonTransparentUp

number of BSSMAP
messages sent by the BSC

1503

aNonTransparentDown

number of BSSMAP
messages received by
the BSC

1613

tchFrResourceFailureTrZone

number of TCH/FR and
preemptable PDTCH
allocation failures in the

1841/0

assignRequestSdcchToTchChannel

number of assignment
request messages received:
modification from an SDCCH
channel to a TCH channel

1842/0

assignFailureSdcchToTch-C
hannel

number of emission of
ASSIGNMENT FAILURE
messages on the A interface:
channel to a TCH channel or
a preempted PDTCH

1.3.4 Queuing procedure (successful completion)
Data Flow Diagram: queuing of the assignment procedure (successful
completion).

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65

(2) There are no TCH resources available. Downlink DTAP service is
resumed.
(3) When a TCH resource is successfully allocated internally in the BSC
software, the queued request is serviced and the following counters are
incremented:
•

1094 tcAllocated (number of terrestrial circuits allocated)

•

1095 tcAveragedUsedMoy/Max/Cum//Ech (average number of terrestrial
circuits used)

•

1609/0 chFrAllocatedTchAllocationTrZone (number of TCH/FR allocated
for trafﬁc in the inner of outer zone of the cell)

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•

1611/0 tchFrAveragedUsedTchAllocationTrZoneMoy/Max/Cum/Ech
(average number of TCH/FR used for trafﬁc in the inner or outer zone
of the cell)

•

1616/n

•

1812 allocatedCircuitTsMoy/Max/Cum/Ech (number of
TS allocations for trafﬁc on circuit mode in the cell or

or data):
•

either 1197/0 (FR) or 1197/1 (EFR) for speech

•

or 1709 and 1705/n (n=0 to 6) for transparent data

•

or 1710 and 1707/n (n=0 to 2) for non transparent data

(6) When the ASSIGNMENT_COMMAND message is received,
1049 attemptedTchFrSeizures (number of TCH/FR assignment
requests) is incremented and, if the MS is the dualband type, 1715
attemptedTchFrSeizuresMsDualb is also incremented.
(7) When the STOP_MEASUREMENT message for the SDCCH channel is
1601, 1602, 1603, 1622, 1623, 1624, 1625, 1626, 1805, 1806, 1807 and
1808.
(8) The old (SDCCH) channel is released. 1050 successfulTchFrSeizures
is incremented and, if the MS is the dualband type, 1716
successfulTchFrSeizuresMsDualb is also incremented.
(9) Downlink DTAP service is resumed.
functionality.
Counter
number

Counter name

Function

1044

signallingPhaseDurationMoy/
Max/Cum/Ech

channel seizure

1045

signallingPhaseDurationHighMoy/Max/Cum/Ech


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Counter
number

67

Function

Counter name

1049

attempedTchFrSeizures

number of TCH/FR
assignment requests

1050


number of TCH/FR
successfully assigned

1094

tcAllocated

allocated

1095

tcAveragedUsedMoy/Max/C
um//Ech

circuits used

1107

aInputMessage

received by the BSC

1108

aOutputMessage

sent by the BSC

1197/0

channelActivateSpeechFullR
ate

for speech: Full Rate
algorithm

1197/1

channelActivateSpeechEnha
ncedFullRate

for speech: Enhanced Full
Rate algorithm

1502

aNonTransparentUp

number of BSSMAP
messages sent by the BSC

1503

aNonTransparentDown

number of BSSMAP
messages received by
the BSC

1601

downlinkPowerCtrlMaxSdcch
Moy/Max/Cum/Ech


1602

uplinkPowerCtrlMaxSdcchMo
y/Max/Cum/Ech

duration of maximum uplink

1603

connectionDurationSdcchMo
y/Max/Cum/Ech

connection duration of
SDCCHs (concentric cell)

or

or

connectionDurationSdcchTrZ
oneMoy/Max/Cum/Ech

connection duration of
SDCCHs (non-concentric
cell)

sdcchAveragedUsedTrZone
Moy/Max/Cum/Ech

average number of SDCCHs
used in the inner or outer
zone of the concentric cell

1607

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Counter name

Function

1609/0

tchFrAllocatedTchAllocationT
rZone

number of TCH/FR or
preempted PDTCH allocated
for traffic in the inner of outer
zone of the cell

1611/0

tchFrAveragedUsedTchAlloc
ationTrZoneMoy/Max/Cum/E
ch

average number of TCH/FR
or preempted PDTCH used
for traffic in the inner or outer
zone of the cell

1616/n
[n= 0 to 1]

tchAveragedQueueLengthHi
ghPriorityMoy/Max/Cum/Ech
for n=0

number of queued TCH
requests with the highest
priority

and

and

tchAveragedQueueLengthOt
herPriorityMoy/Max/Cum/Ech
for n=1

number of queued TCH
requests with an internal
priority different than the
highest one

msLostMeasurements


Counter
number

1622

or
msLostMeasurementsTrZone

or
(concentric cell)

1623

rxLevDownLink
or
rxLevDownLinkTrZone

sum of downlink signal
strength measurements
received (non-concentric cell)
or
strength measurements
received (concentric cell)

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Counter
number
1624

Function

Counter name
rxLevUpLink
or
rxLevUpLinkTrZone

69

or
(concentric cell)

1625

rxQualDownLink
or

measurements (concentric
cell)
or
quality measurements

1626

rxQualUpLink
or
rxQualUpLinkTrZone

sum of uplink signal
quality measurements
or
measurements (concentric
cell)

1705/n (n = 0
to 6)

channelActivateTchFrDataTx
(x = 16 to 14400 b/s)

number of TCH/FR activation
for transparent data service
with a transmission rate = x

1707/n (n = 0
to 2)

channelActivateTchFrDataNT
x (x = 6 to 14500 b/s)

number of TCH/FR activation
for non transparent data
service with a transmission
rate = x

1710

channelActivateTchFrNData
NTHscsd

number of channel activation
for non transparent data
service on TCH/FR

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Counter
number

Function

Counter name

1715

attemptedTchFrSeizuresMs
Dualb

number of attempts of
assignation of a TCH/FR for
dualband mobiles

1716

successfulTchFrSeizuresMs
Dualb

number of successful TCH/FR
assignations for dualband
mobiles

1717

abisTrauFrameDlReceived

downlink received

1718

abisTrauFrameDlCorrected

downlink corrected

1719

abisTrauFrameDlMuted

downlink that can not be
corrected

1720

radioFrameUlReceived

number of radio frames uplink
received

1721

ECU_Activation

number of erroneous frames
(ECU may be activated or not)

1744
tchFrAllocated

number of TCH/FR or
in the cell

or
or
number of TCH/FR or
in the inner or outer zone of
the cell

1746

tchFrAveragedUsedMoy/Ma
x/Cum/Ech

or preempted PDTCH used in
the cell

or
or
tchFrAveragedUsedTrZoneM
oy/Max/Cum/Ech

or preempted PDTCH used in

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1.4 Handovers 71

Counter
number

Function

Counter name

1805

msPowerIncControl

number of MS increment
power controls ordered by the
Layer 1 management

1806

msPowerDecControl

number of MS decrement
Layer 1 management

1807

bsPowerIncControl

number of BS increment
Layer 1 management

1808

bsPowerDecControl

number of BS decrement
Layer 1 management

1812

allocatedCircuitTsMoy/Max/C
um/Ech

number of TS allocations for
traffic in circuit mode in the
cell

or
or
allocatedCircuitTsTrZoneMoy
/Max/Cum/Ech

1841/0

assignRequestSdcchToTchC
hannel

number of TS allocations for
traffic in circuit mode in the
inner or the outer zone of the
concentric cell

number of assignment
request messages received:
channel to a TCH channel

1.4 Handovers
1.4.1 Overview
Each handover procedure performed in a cell requires two phases, a
selection phase and an execution phase.
•

selection phase: choice of the target cell (outgoing handover) or radio
channel (incoming or intra-bts handover)

•

execution phase: switchover from one radio channel to another

The execution phase is not started unless the selection phase is successfully
completed as shown in the following diagram.

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The ratios between the following counters are used to evaluate the efﬁciency
of the procedures implemented in the BSS:
•

Number of handovers required (hoRequiredXxx)

•

Number of handover requests (hoRequestXxx)

•

Number of handovers executed (hoExecutionXxx)

•

Number of successful handovers (hoSuccessXxx)

The procedures call on the following counters in problem cases:
•

permanent bsc observation:
— hoIndicationNotTreatedTchoke
— hoIndicationNotTreatedTmtBtwHo
— hoUnsuccessReestIntraBts on TCH or SDCCH
— hoUnsuccessReestOutgoingIntraBss on TCH or SDCCH
— hoUnsuccessReestIncomingIntraBss on TCH or SDCCH
— hoUnsuccessOutgoingIntraBssNAttempt on TCH or SDCCH
— hoUnsuccessReestOutgoingInterBss on TCH or SDCCH
— hoUnsuccessOutgoingInterBssNAttempt on TCH or SDCCH

•

temporary "handover" observation:
— hoIntraBtsUnsuccessXxx on TCH or SDCCH
— hoIntraBtsFailureXxx on TCH or SDCCH
— hoOutIntraUnsuccessXxx on TCH or SDCCH
— hoOutIntraFailureXxx on TCH or SDCCH
— hoInIntraUnsuccessXxx on TCH or SDCCH
— hoInIntraFailureXxx on TCH or SDCCH
— hoOutInterUnsuccessXxx on TCH or SDCCH

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1.4 Handovers 73

— hoOutInterFailureXxx on TCH or SDCCH
— hoInInterUnsuccessXxx on TCH or SDCCH
— hoInInterFailureXxx on TCH or SDCCH

1.4.2 Accounting principles
To synchronize accounting, all the counters concerned by the same
handover request are incremented at the end of the procedure, except
for the counters used to tally repeated requests and refusals, which are
stepped up in real time.
The following diagram is an example of an outgoing handover requested by
cell N in BSS 1 that is refused by the ﬁrst cell in the list (cell A in BSS 1)
and executed successfully in the second cell (cell B in BSS 2). It shows the
counters that are updated by the handover procedure.

1.4.3 Intra-bts handover procedure
In the intra-bts handover procedure, a dedicated channel is assigned
in response to a modify radio channel request sent by Level 1 (Layer 1
Management).
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Data Flow Diagram : intra-cell handover procedure (normal completion with
communication on TRAFFIC phase)

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1.4 Handovers 75

(1) A TCH resource is successfully allocated internally in the BSC software
on the target cell. Then the following counters are incremented:
•

1609/0 tchFrAllocatedTchAllocationTrZone (number of TCH/FR
allocated for trafﬁc in the inner of outer zone of the cell)

•

of the cell)

•


or data):
•

either 1197/0 (FR) or 1197/1 (EFR) for speech

•

1709 and 1705/n (n=0 to 6) for transparent data

•

1710 and 1707/n (n=0 to 2) for non transparent data

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(3) When the STOP_MEASUREMENT message for the TCH channel is
1198, 1199, 1600, 1622, 1623, 1624, 1625, 1626, 1805, 1806, 1807, 1808
and 1809/n
functionality.
(5) When the deallocation of TCH is successfully performed in the
originating cell, the following counters are decremented:
•


•

1746 tchFrAveragedUsedMoy/Max/Cum/Ech (average number
of TCH/FR used in the cell) or tchFrAveragedUsedTrZoneMoy/Max/Cum/Ech (average number of TCH/FR used in the inner
or outer zone of the cell)

•

of the cell)

Counter
number

Counter name

Function

1081

hoRequestIntraBts

number of intra-bts handovers
on TCH requested in the cell

1082

hoExecutionIntraBts

number of attempts to execute
intra-bts handovers on TCH
in the cell

1083

hoSuccessIntraBts

number of successful intra-bts
handovers on TCH in the cell

1108

aOutputMessage

sent by the BSC to the MSC

1138/n
[n=0 to 16]

hoRequiredTchXxx

number of handovers on TCH
required: CauseXxx

1197/0

channelActivateSpeechFullR
ate

for speech: Full Rate
algorithm

1197/1

channelActivateSpeechEnha
ncedFullRate

for speech: Enhanced Full
Rate algorithm

411-9001-133 16.07 Preliminary
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.


Observation counter fundamentals411 9001-133.16.07

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