cell tracing record_

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CTR Workshop

Cell Traffic Recording

Top right corner for field-mark, customer or partner logotypes. See Best practice for example.

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Bullets level 2-520 pt

Ericsson Confidential 2009-07-012

Network Optimizers Tools


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Optimization Key Steps


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CTR Definition

Cell Traffic Recording (CTR) CTR collects data about

connections in specific cells.

Certain events can be used as triggers and all communicationon up- and downlink is recorded.

CTR could be used if there are specific problems found in any cell, such as an abnormal number of TCH drops.


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CTR Radio Characteristics

Signal Strength, UL and DL Signal Quality, UL and DL Actual Time Advance MS Power Reduction BS Power Reduction K-value L-value Ranking Speech Quality Index (SQI)


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CTR Reports

General Information Report Event Statistics Report Measurement Data and Event Graph Measurement Data and Event List Detailed Report Handover Statistics Report Power Distribution Report


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CTR/MTR Events


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PMR Overview – Recording CTR• Initiated for a specified BSC identity and access cell

• Maximum recording length: 1 hour

• Start Criterion:

• Cell Access (CA)

• Connection Release (CR)

• Handover (HO)

• Trace Invocation (TI)

• Recording Type: events and measurements or events only

• Time Range: total time (before and after an event) during which measurement data is to be recorded

• Recording Area: access cell, access cell and neighbors, BSC

• Useful for cell level troubleshooting


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PMR Statistics Overview - ApplicationsCTR and MTR


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PMR Statistics Overview – Reports

Shows all events and causes in the recording and the number of occurrences

Graphical presentation of events andmeasurements data

Presents measurements and eventsinformation for one or several connections

Lists all handover events from serving cellto neighboring cells (RxQual and RxLev before/after)

Shows MS and BTS power reductionvalues used in the recording

Presents the distribution of measureddata collected during the recording(histograms)

Shows detailed statistical data on all the channel events

Presents the interference band (1-5) for several channels as a

function of time

Shows statistical information for all the priority levels

(INAC, PROBF)

Presents statistical information on selection type

(channel allocation)

Includes statistical information for all the traffic cases

(assignment, handover)


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PMR Statistics Overview – Export

• To take advantage of Manhattan data processing tool, it is necessary to export data from PMR (create a TT Authority file)

• Manhattan tool provides a fast way of showing the distribution of the radio characteristics and their relation (MTR and CTR) – temporal reference

• Event data is also taken into account, when presenting the distribution of the radio characteristics at a dropped call event identification of radio environment conditions when the connection drops!!!


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CTR Practice

Support Documents and links:

– CPI

http://cpi.al.sw.ericsson.se/alex

– Documents

Statistic GuidelineCTR Manual Setup

Manhattan Macro V3.1

CTR File Structure


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