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    Performance Measurements

    DN9813612Issue 10-0 en

    # Nokia Corporation 1 (22)

    BSC3119

    Nokia BSC/TCSM, Rel. S12, Product

    Documentation, v.1

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    The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This document is intended for the useof Nokia's customers only for the purposes of the agreement under which the document issubmitted, and no part of it may be reproduced or transmitted in any form or means without the

    prior written permission of Nokia. The document has been prepared to be used by professionaland properly trained personnel, and the customer assumes full responsibility when using it.Nokia welcomes customer comments as part of the process of continuous development andimprovement of the documentation.

    The information or statements given in this document concerning the suitability, capacity, orperformance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the document areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the document.

    Nokia's liability for any errors in the document is limited to the documentary correction of errors.NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENTOR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARYLOSSES), that might arise from the use of this document or the information in it.

    This document and the product it describes are considered protected by copyright according tothe applicable laws.

    NOKIA logo is a registered trademark of Nokia Corporation.

    Other product names mentioned in this document may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.

    Copyright Nokia Corporation 2007. All rights reserved.

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    Contents

    Contents 3

    List of tables 4

    List of figures 5

    Summary of changes 7

    1 Performance measurements 91.1 Call control measurements (CSW) 111.2 GPRS measurements (PSW) 171.3 Transmission measurements 181.4 Observations 20

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    Contents

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    List of tables

    Table 1. Example of a counter table 9

    Table 2. Transmission measurement and equipment types 19

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    List of figures

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    List of figures

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    Summary of changes

    Changes between document issues are cumulative. Therefore, the latest document

    issue contains all changes made to previous issues.

    Changes made between issues 10 and 91

    Information on the counter numbering of 21 Radio Measurement Report, 24

    Dropped Call Observation, and 50 BSC Level Clear Code Measurement has been

    added.

    New fields Trigger type and Sampling interval have been added to the table

    Example of a counter table, and the description of the Unitfield has been revised.

    Information on spare counters and a reference to NOLS Documentation Center's

    Reference Information Service has been added.

    Three new call control measurement types have been added: 106 CS DTMMeasurement, 107 AMR RX Quality Measurement, and 108 DFCA SAIC

    Measurement.

    One new GPRS measurement type has been added: 105 PS DTM Measurement.

    One observation type has been removed because it is no longer supported: 23

    ISDN Abis Observation.

    26 Position Based Services Observation has been changed into 30 Position Based

    Services Observation.

    References to online observations have been removed because online

    observations are no longer supported.

    Reference to TCSM2 has been removed.

    Editorial changes have been made.

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    Summary of changes

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    Changes made between issues 92 and 91

    The description of Drop Call Breakdown Observation has been updated.

    Changes made between issues 91 and 9

    A new call control measurement, 109 Soft Channel Capacity Measurement, has

    been added.

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    1 Performance measurementsCounters are numbered according to the measurement type XXXYYY, where

    XXX is the measurement type and YYY is the counter number of the

    measurement. 21 Radio Measurement Report, 24 Dropped Call Observation, and

    50 BSC Level Clear Code Measurement are exceptions: their numbering is

    XXXYYYY.

    Information about each counter, including its name, number, description, and

    other details are presented in a table. The table fields are explained in the table

    Example of a counter table.

    Table 1. Example of a counter table

    Number

    Name

    Release

    Definition updated

    Number of the counter

    Name of the counter

    Original release. For spare counters,indicates the release where the spare

    counter was created in the BSC.

    Release where the counter was updated. For

    spare counters, this field may include

    several entries. The release where the spare

    counter was made official is followed by the

    explanation (Name changed).

    Trigger points Includes references to signalling charts if the

    measurement has signalling charts.

    Description Explains what the counter is for.

    Updated Informs when the counter is updated.

    Trigger type Specifies the type of events that trigger the counter:

    event, sample, or duration.

    Dependencies with other counters/PI(s) Informs if the counter is interdependent with other

    counters.

    Feature Specifies the software product the counter is related

    to.

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    Table 1. Example of a counter table (cont.)

    Number

    Name

    Release

    Definition updated

    Number of the counter

    Name of the counter

    Original release. For spare counters,

    indicates the release where the spare

    counter was created in the BSC.

    Release where the counter was updated. For

    spare counters, this field may include

    several entries. The release where the spare

    counter was made official is followed by the

    explanation (Name changed).

    Example values Shows examples of the values the counter can

    receive.

    Impact Explains the impact, for example, call cleared.

    Reason for the impact Explains the reason for the impact.

    Logical type Can be, for example, average or peak. If the logical

    type has not been defined in the table, the counter is

    a basic counter.

    Note! The denominator counter value is always >0.

    Unit Unit in which the values of the counter are given.

    Most often the unit is an integer number. It can also

    be, for example, per cent, kB, ms.

    Range Limits to the values the counter can receive.

    Sampling interval If the trigger type is sample, specifies the interval at

    which the samples are taken.

    The fields of the counter tables are filled in by taking into account the different

    nature of each measurement and observation. For this reason, the tables may vary

    in size and content. For example, if example values are not given for a counter,

    the field Example values is not included in the actual counter table.

    In some cases there can be counter tables with the same counter number. In such

    cases, all the information is technically coded in one counter, but separated in the

    documentation to improve readability.

    Measurements may also include spare counters. They are used for implementing

    new counters in the BSC and Nokia NetAct for temporary use between main

    releases. When a new counter is needed between main releases, the chosen spare

    counter is put into use in the BSC and it starts collecting data to NetAct. In the

    BSC documentation, the counter receives a definition, but its name remains as

    SPARExxxxxx. In the next NetAct main release, the counter is made official, that

    is, it receives a proper name. After this it is included also in the BSC

    documentation with a proper name.

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    Measurements and observations are divided into the following groups according

    to their function:

    .

    Call control measurements (CSW). GPRS measurements (PSW)

    . Transmission measurements

    . Observations

    In general, measurements consist of several counters that measure various

    matters.

    Counters essential for the operation of the network are so-called public counters,

    whereas counters for special situations are so-called expert counters. Public

    counters are documented with the accuracy of signalling charts and trigger points.Measurements that include signalling charts are marked with the text (incl.

    signalling charts) after the name of the document.

    Optional measurements are marked with (optional) after the name of the

    document.

    BSC counter information is also directly available and accessible via the

    Reference Information Service in NOLS Documentation Center. The information

    in the Reference Information Service is updated more frequently than the BSC

    NED browser environment.

    1.1 Call control measurements (CSW)

    Call control measurements measure call-related issues, such as congestion on a

    specific channel or area.

    Call control measurements can be divided into two groups:

    . circuit-switched (CSW) measurements

    . packet-switched (PSW) measurements

    The packet-switched measurements are referred to as GPRS measurements. For

    more information, see 1.2 GPRS measurements (PSW).

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    No Measurement/optionality Purpose/function Level/role/

    application

    1 Traffic Measurement (incl. signalling

    charts)

    Registers information related to the

    SDCCH and TCHs. Provides informationon, for example, seizure attempts and

    successful seizures for the SDCCH and

    the TCH.

    BTS-level

    2 Resource Availability Measurement Registers information on the availability

    of TCH and SDCCH. Provides

    information on, for example, TCH

    congestion time and the peak number of

    busy TCHs and SDCCHs.

    BTS-level

    3 Resource Access Measurement (incl.

    signalling charts)

    Registers information on all CCCHs of

    the BSC. Indicates the number of paging

    messages sent to the BTS, and

    successful seizures for mobile-originated

    (MO) and mobile-terminated (MT) calls.

    BTS+TRX -level

    4 Handover Measurement (incl.

    signalling charts)

    Registers information on the number of

    handovers (HO) controlled by the MSC

    or the BSC. Records the number of the

    incoming, outgoing, or intra-cell HOs,

    and the number of successful and

    unsuccessful attempts, seizures, and

    HOs. The HOs are sorted according to

    direction, where appropriate.

    BTS-level

    5 Power Control Measurement Registers information on how the BSC

    controls the power level and signal

    quality of the MS and the BTS. Provides

    information, for example, on the qualityand strength of the signals both in uplink

    and downlink directions.

    BTS+TRX -level

    6 Load Measurement Registers information on the peak and

    the average load rate of the computer

    units.

    BSC-level

    7 Availability Measurement Registers information on the restart and

    the disconnection times of the computer

    units. Used for field reporting.

    BSC-level

    8 OSI/X.25 Measurements Provides information on the four lowest

    layers of the OSI stack, that is,

    information on how the connection

    between the BSC and Nokia NetActfunctions.

    OSI-channel+Unit nbr

    -level

    13 Undefined Adjacent Cell Measurement Registers statistics on cells, which have

    not been defined as adjacent cells but

    are among those six neighbouring cells

    that the MS receives best. Provides

    information on the signal strength of

    those cells.

    BTS-level

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    No Measurement/optionality Purpose/function Level/role/

    application

    14 RX Quality Statistics Measurement

    (optional)

    Registers information both in uplink and

    downlink directions on the TRXs.Provides information on the RX quality

    band frequencies with the accuracy of

    one TRX, BTS or BSC. The RX quality

    frequencies are collected only of the

    TCHs.

    BTS+TRX -level

    15 Handover Adjacent Cell Measurement

    (incl. signalling charts) (optional)

    Registers information on handover

    attempts, successful handovers and

    failed handovers due to lack of radio

    resources. Provides information on how

    handovers between different cells are

    divided.

    BTS-level (+HO

    category level

    optionally

    50 BSC Level Clear Code Measurement Collects statistics on clear codes for the

    BSC during calls. Registers failures thathave occurred during a call (signalling or

    conversation). Provides information on

    the quality of service in the BSC with the

    accuracy of a cell.

    BSC-level

    51 BSC Level Clear Code (PM)

    Measurement(incl. signalling charts)

    Provides information on transactions in

    the BSC, for example, location update

    and failure sum counters. The

    information is especially relevant from

    the point of view of determining the

    service level.

    BSC-level

    52 Underlay Overlay Statistics

    Measurement (incl. signalling charts)(optional)

    Registers information on the performance

    of the Intelligent Underlay-Overlayprocedure. Provides information with the

    accuracy of one TRX.

    BTS+TRX -level

    (+freg. group)

    53 RX Level Statistics Measurement

    (optional)

    Registers information on the level and

    quality of RX signal on both uplink and

    downlink direction. Provides the

    information in six classes per RX quality

    band in both uplink and downlink

    directions.

    BTS+TRX -level

    54 Link Balance per MS Classmark

    Measurement (optional)

    Registers information on the link balance

    in the network, that is, the difference

    between the uplink and downlink signal

    levels. The link balance difference is

    divided into 11 subclasses: 6 classes for

    negative imbalance, one class for

    balance and 5 classes for positive

    imbalance. The measurement provides

    the information with the accuracy of one

    cell.

    BTS-level

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    No Measurement/optionality Purpose/function Level/role/

    application

    55 Timing Advance Statistics

    Measurement (optional)

    Registers information on the timing

    advance during calls. With thisinformation you can estimate the

    distribution of the subscribers within a

    cell area. The measurement provides the

    information with the accuracy of either

    one BTS or one BSC.

    The timing advance values are divided

    into ten subclasses. The user sets the

    ranges for the classes, for example, the

    range can be denser in a micro cell than

    in a macro cell.

    BTS-level

    56 Resource Availability per BSC

    Measurement

    Registers information on the availability

    of the TRXs on the BSC level. The

    number of the TRXs which are notavailable is divided into three categories

    according to what causes the

    unavailability: the user, internal reasons,

    and external reasons.

    BSC-level

    57 BSC Level Clear Code (SERLEV)

    Measurement (incl. signalling charts)

    Registers statistics about clear codes in

    a BSC during calls. Provides general

    information on transactions in the BSC.

    BTS-level

    58 MS Speed Detection Measurement

    (optional)

    Collects information on the speed of MS.

    Provides information on slow moving and

    fast moving MSs. The information is

    collected for each cell. The MS speed

    statistics is collected only from the TCHs.There are three MS speed classes.

    BTS-level

    59 Dual Band Measurement (optional) Provides information on the traffic

    distribution, that is, on TCH holding times

    and reservations of single and dual band

    subscribers. The information is collected

    for each cell.

    BTS-level

    60 C/I Ratio Measurement (optional) Collects statistics on the degree of the

    interference by measuring traffic intensity

    (Erlang) on a specified C/I (carrier/

    interference) ratio band. Estimates the

    level of the potential co- and adjacent

    channel interference in the radio network.

    BTS-level (LAC-CI)

    61 Hot Spot Measurement (optional) Registers information on the adjacent cell

    RX levels and on timing advance

    distribution. Finds out the highest traffic

    distribution spots in the mobile network.

    With this measurement you can retrieve

    information that indicates the places in

    the network where more capacity is

    needed.

    BTS+TRX -level

    (LAC-CI)

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    No Measurement/optionality Purpose/function Level/role/

    application

    67 High Speed Data Measurement

    (optional)

    Collects statistics about radio resources

    used for fulfilling High Speed CircuitSwitched Data (HSCSD) requests.

    Measures the functioning of the HSCSD

    and 14.4 kbit/s Data Services software

    products.

    BTS-level

    70 Channel Finder Measurement

    (optional)

    Registers statistics on cells which have

    not been defined as adjacent cells, but

    are among those six neighbouring cells

    that the MS receives best. Provides

    information on the signal strength

    standard deviation, and class boundaries

    of those cells.

    BTS-level

    71 MS Capability Indication Measurement

    (incl. signalling charts) (optional)

    Provides cell-specific information on the

    capabilities of the MSs.

    BTS-level

    75 Defined Adjacent Cell Measurement

    (optional)

    Registers statistics on defined cells. This

    measurement data is collected in cell

    level.

    BTS-level

    77 FER Measurement (optional) Registers information both in uplink and

    downlink directions on the TRXs.

    BTS+TRX+codec -

    level

    78 Position Based Services

    Measurement (optional)

    Registers location requests grouped by

    LCS QoS, location responses grouped

    by accuracy, and error cases.

    BTS-level (LAC-CI)

    89 Reversed Hunting Measurement

    (optional)

    Registers information on the BSS, which

    allocates the circuit needed directly

    based on the radio interface resources.

    A interface pool-level

    92 Non-BCCH Layer Offset Measurement

    (optional)

    Registers link budget differences in the

    serving cell.

    BTS-level

    93 UTRAN Handover Adjacent Cell

    Measurement (incl. signalling charts)

    (optional)

    Registers statistics about the distribution

    of inter-system handovers between

    different cells.

    BTS-level

    94 UTRAN Neighbouring Cell Signal

    Level Measurement (optional)

    Registers information on signal levels of

    WCDMA RAN cell in the neighbourhood

    of a GSM serving cell.

    BTS-level

    99 Total FEP Measurement (optional) Collects statistics on the cumulated sum

    of frame erasure probability (FEP) values

    for a certain serving cell - neighbouringcell pair. Includes separate counters for

    co-channel and adjacent channel

    interference.

    BTS-level

    100 DFCA Measurement (optional) Collects statistics on the performance of

    the DFCA application software. The data

    is collected at cell level separately for

    each connection type (FR/EFR, HR,

    14.4, AMR FR, and AMR HR).

    BTS-level +

    connection type

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    application

    101 DFCA Assignment Measurement

    (optional)

    Collects statistics on the usage of DFCA

    channels at cell level. The assignmentcounters are updated whenever the

    corresponding MA list and MAIO are

    used in a DFCA assignment.

    BTS-level

    102 BSC-BSC Measurement (optional) Collects statistics on the inter-BSC

    communication related to the DFCA

    application software. The counters of this

    measurement record information on

    average and peak delay between the

    Radio Resource Managers in separate

    BSCs.

    Signalling point code

    103 WPS Measurement (optional) Registers information on the performance

    of traffic channel allocation and queuing

    algorithms in granting priority access toWPS users.

    BTS-level

    104 IMSI Based Handover Measurement

    (optional)

    Collects statistics on the IMSI-based

    handover attempts and failures for each

    Authorised Network (ANE). There are

    separate counters for GSM and UTRAN

    networks.

    BTS-level

    106 CS DTM Measurement (incl. signalling

    charts) (optional)

    Collects statistics on Dual Transfer Mode

    (DTM). Mainly collects MS-initiated DTM

    call establishment information and CS

    connection-related information of a DTM

    call.

    BTS-level

    107 AMR RX Quality Measurement

    (optional)

    Collects statistics on uplink and downlink

    RX quality for each AMR bitrate. The

    information is collected from each

    transceiver (TRX) separately.

    BTS+TRX -level

    108 DFCA SAIC Measurement(optional) Collects statistics on the performance of

    the DFCA application software for

    connections of SAIC-capable mobiles.

    The data is collected at cell level

    separately for each connection type (FR/

    EFR, HR, 14.4, AMR FR, and AMR HR).

    BTS-level +

    connection type

    109 Soft Channel Capacity Measurement

    (optional)

    Collects statistics on the availability of

    traffic channels (TCH) in the BCSU

    object level. The time congestion ofTCHs and the average and peak

    numbers of busy TCHs are measured.

    BCSU Logical

    Address

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    1.2 GPRS measurements (PSW)

    GPRS measurements are packet-switched (PSW) call control measurements.

    GPRS measurements measure call-related issues, such as congestion on a specificchannel or area. For circuit-switched (CSW) measurements, see 1.1 Call control

    measurements (CSW).

    No Measurement/optionality Purpose/function Level/role/

    application

    72 Packet Control Unit Measurement

    (incl. signalling charts)

    Provides cell-level information on the

    functions in charge of the Packet

    Control Unit (PCU). The counters

    concentrate on the amount of packet-

    traffic related transactions, data

    throughput quality of provided service(failed/passed transactions), and the

    availability of service (for example,

    congestion, load of interfaces). The

    need to get more capacity is indicated

    well in advance.

    BTS-level

    73 RLC Blocks per TRX Measurement Provides TRX-specific information on

    data throughput quality based on the

    RLC/MAC blocks. The information can

    be used for parameterisation of TRX

    capacity.

    BTS+TRX -level

    74 Frame Relay Measurement Provides bearer channel and PVC

    (Permanent Virtual Connection) specificinformation on the proper working of the

    frame relay between the PCU and the

    SGSN.

    Bearer-level

    76 Dynamic Abis Measurement (optional) Registers information on the

    unsuccessful call establishment and

    peak and average usage of dynamic

    abis pool.

    Abis pool-level

    79 Coding Scheme Measurement

    (optional)

    Registers information about the amount

    of data transferred to uplink and

    downlink directions in the radio interface

    using the different EGPRS modulation

    and coding schemes (MCS) and GPRS

    coding schemes CS-3 and CS-4.

    BTS+coding scheme -

    level

    90 Quality of Service Measurement Registers information related to priority.

    Provides information on, for example,

    the number of RLC blocks and TBFs.

    Segment+QoS priority

    class -level

    91 PBCCH Availability Measurement Registers availability of packet control

    channels.

    BTS-level

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    No Measurement/optionality Purpose/function Level/role/

    application

    95 GPRS Cell Reselection Measurement

    (optional)

    Registers information about the source

    and target cell, the number of cellreselection attempts for various causes,

    the number of successful NCCR

    procedures, and the number of failures

    for various failure reasons.

    BTS-level + LAC-CI

    96 GPRS RX Level and Quality

    Measurement (optional)

    Collects RX quality levels per each RX

    class, and quality information per coding

    scheme.

    BTS + TRX + coding

    scheme

    97 Enhanced Quality of Service

    Measurement

    Records information about PFC

    procedures, transferred data, and quality

    control.

    SEG + TC-THP-PFI+

    ARP

    98 Gb Over IP Measurement (optional) Registers the data related to Gb over IP.

    IP provides an alternative to FrameRelay (FR) as a transport layer for the

    Gb interface. The information is

    collected from every Network Service

    Virtual Connection (NS-VC) identified

    with NS-VC id and NSE (Network

    Service Entity) id.

    NS-VCI + NSEI

    105 PS DTM Measurement (incl. signalling

    charts) (optional)

    Collects statistics on Dual Transfer

    Mode (DTM). Mainly collects network-

    initiated DTM call establishment

    information and PS connection-related

    information of a DTM call.

    BTS-level

    1.3 Transmission measurements

    Transmission measurements measure transmission and network quality.

    The measurements collect data from counters in every working transmission

    equipment and exchange terminal (ET). The transmission equipment increment

    some of the counters all the time and some only when transmission errors happen.

    They register the availability of the connection and the time during which there

    are errored bits in the transferred data. They also register information on

    functional disturbances, frame errors, and slips. This information is used indowntime statistics.

    The information is collected from the transmission equipment, which is divided

    into suitable groups. The division is made based on the equipment type and

    generation. Table Transmission measurement and equipment types describes this

    division.

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    Table 2. Transmission measurement and equipment types

    Measurement type Equipment type Equipment generation

    DMR DMR TMS4

    DN2 DN2 TMS4

    TRU/BIE TRU, BIE TMS4

    Not supported TRE TMS4

    TRE TRE, DMR Nokia Q1

    TRE_SEL TRE, DMR Nokia Q1

    In practice, the Nokia Q1 generation equipment comprise the Nokia MetroSite

    transmission equipment. Transmission Equipment Measurement (TRE) collects

    information from all the equipment in the network, while Selective TransmissionEquipment Measurement (TRE_SEL) collects information from a selected part of

    the network.

    The connection between the BSC and the managed equipment is established

    either through a BSC-BTS O&M link or a Q1 service channel. The possible

    equipment types at a Base Transceiver Station (BTS) site are: Base Station

    Interface Equipment (BIE), Transmission Unit (TRU), and Digital Microwave

    Radio Link (DMR). Other transmission equipment types at the BTS site, such as

    optical line equipment, are handled in the BSC with the common name

    Transmission Equipment (TRE).

    With the QWL command you can list the equipment type and generation of all the

    equipment in the network. With the MML commands in the QU command group

    you can select and interrogate the equipment for Selective Transmission

    Equipment Measurement.

    In general, a measurement collects data from all equipment defined in the

    measurement type. Therefore, it is not possible to collect statistics from specific

    equipment of a measurement type. With Selective Transmission Equipment

    Measurement you can only define the part of the MetroSite transmission system

    you want to measure.

    No Measurement/optionality Purpose/function Level/role/

    application

    62 DMR Measurement Registers information on the signal

    quality and frequency input level of radio

    hopping, controlled by a DMR. The

    measurement collects information from

    the radio relay equipment.

    PCM-level

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    No Measurement/optionality Purpose/function Level/role/

    application

    63 DN2 Measurement Registers information on the signal

    quality of the PCM wire connected to aDN2. The measurement provides

    information on transmission quality in

    used PCM connection between a DN2

    and the BSC or another transmission

    equipment.

    PCM-level

    64 TRU/BIE Measurement Registers information on the signal

    quality of the PCM wire connected to the

    transmission unit (TRUA/TRUB) and/or

    the base station interface equipment

    (BIE). The measurement provides

    information about transmission quality in

    used PCM connection between a TRU/

    BIE and the BSC or anothertransmission equipment.

    PCM-level

    65 ET BSC Measurement Provides information on the signal quality

    of the PCM wire, which is connected to

    the exchange terminal (ET) equipment

    controlled by a BSC.

    PCM-level

    66 ET TCSM Measurement Provides information on the signal quality

    of the PCM wire, which is connected to

    the ET equipment controlled by a TCSM.

    PCM-level

    68 TRE Measurement Registers information on the signal

    quality of the MetroSite transmission

    system.

    PCM-level

    69 Selective TRE Measurement Registers information on the signal

    quality and frequency input level (only

    from radio relay equipment) of the

    selected part of the MetroSite

    transmission system.

    PCM-level

    1.4 Observations

    Observations are useful in the BSC status monitoring as they give exact, almost

    real time information on the network's performance: its traffic situation, handoversuccess, and handover problems. With the aid of the observations, you can

    examine, for example, abnormal function or traffic pattern of calls on a specific

    cell or channel, why several calls have ended prematurely without any obvious

    reason, or why it is not possible to establish calls from some location area. This

    information is useful in system maintenance and system testing.

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    Basically, all observations have the same function: they generate records on

    specific occasions. However, they have a different observation record format, and

    they differ in the triggering conditions for generating an observation record. For

    example, activity on the chosen channel creates channel observation records,

    handovers occurring in the observing cell create handover records, and a clear

    code observed during a call in the observed cell creates clear code observation

    records.

    The observation records are stored on disk files either when the observation

    buffer is full or at user-defined intervals. The disk files are then transferred to

    Nokia NetAct for post-processing.

    You can activate the appropriate observation to a desired object and define a

    schedule for that observation. When needed, you can also start the observations

    immediately without a schedule.

    No Observation/optionality Purpose/function

    16 SDCCH Observation Provides information on activity on the SDCCH. An

    observation report is generated every time the

    SDCCH is released.

    17 TCH Observation Provides information on the use of the TCH. An

    observation report is generated every time the TCH

    is released.

    18 Handover Observations (including internal,

    incoming and outgoing handover observations)

    Provides information on handovers made in the

    BSC, from some other BSC to the observing BSC,

    and from the observing BSC to some other BSC. Anobservation report is generated every time such an

    HO occurs.

    21 Radio Measurement Report Provides information on handovers made during the

    call as well as levels and qualities of the uplink and

    downlink signals and the signal levels received by 6

    adjacent cells.

    22 Clear Code Observation Provides information on dropped calls or handover

    problems. There are two possible ways to use this

    observation: to observe all failure clear codes under

    one BTS or one failure code under the whole BSC.

    An observation report is generated every time a

    specific clear code occurs, or a clear code occurs in

    the observed BTS.

    24 Dropped Call Observation (optional) Provides information on dropped calls. An

    observation report is generated every time a call is

    dropped.

    25 TBF Observation for GPRS Trace Collects information on allocations, reallocations,

    and releases of Temporary Block Flows (TBF) as

    well as changes in the used coding scheme and MS

    flow control.

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    No Observation/optionality Purpose/function

    27 GPRS Cell Reselection Report Trace report for GPRS trace that contains

    information about NCCR triggering, NACC usage,

    and possible failures.

    28 GPRS RX Level and Quality Report Report type needed to record the serving and

    neighbour cell measurements and quality data.

    29 Drop Call Breakdown Observation (optional) Dissolves the updates of the counters 057044/

    001202 DROP AFTER TCH ASSIGN and 002071

    CLEAR REQUEST SENT BY BSC ON TCH to get

    more accurate data on dropped calls.

    30 Position Based Services Observation (optional) Collects detailed information on the positioning

    calculation procedure in the BSC. The observation

    report is collected for each location procedure of the

    ME located in the target cell for the observation.

    Related topics

    . BSC Statistics Administration

    . BSC Measurement Counters Displaying Program (FOXMEA)

    . PCU2 Service Terminal Commands

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