LTE Cell Trace and UE Trace Handling

Cell Trace

• The Cell trace feature collects events/traces for a group of cells. It collects all events related to the cell relations for that cell and for the entire RBS.

• The Cell trace is the most common form of general troubleshooting within the network. It is possible to analyze overall performance of the network seeing patterns and trends within a large group of cells/RBSs.

OSS-RC

Activate Trace

EnodebCellTrace

EnodebCell Trace

Enodeb Upload trace file in OSS

Activating Cell Trace

Start LTE GUI measurement

Add CTR Profile

Select LTE Cell Trace Profiles tab. Right click to add profile and select LTE Cell Trace recording profile

Specify Details for the Cell Trace Event

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4Select Output Mode as file. Streaming option is available but is still under testing by AT&T HQ

Select all sectors in the EnodeB or specific sector

Define Cell Trace nameSelect Enodeb from list

Event and UE fraction

Select the Events to be captured. Select UE Fraction – 1000 enables traces for ALL UEs camped on that cell for each 15 minute ROP

Duration of Trace

Define duration of the trace

Activating Trace Profile

Right click on the Cell Trace Name and select Resume Profile

Verify Trace Status

Admin State and Op State of Profile should be active after resuming profile

Reading Cell Trace

In OSS Common Explorer select Network Status Perspective. Search for the Cell where the trace was active and under the View tab you can select Traffic Recordings View.

Decoding Messages

Select the Cell Trace File, then the message type and the properties tab will show more details

UE Trace

• The UE Trace feature is designed to allow the tracking of a single UE in the network by means of a global identifier e.g. IMSI or IMEI.

• Each UE trace generates an event during a ROP 15 minutes period will create its own file in the OSS with the trace reference in the name of the file.

• There can be up to 16 simultaneous UE traces for one RBS.

• 256 simultaneous traces are supported by the OSS-RC.

Add UETR Profile

Select LTE UE Trace Profiles tab. Right click to add profile and select LTE UE Trace recording profile

Specify Details for the UE Trace Event

subscription profile name and comment pane

select UETR events

enter IMSI number

Profile Schedule Wizard

Activating UETR Profile

• Activation of UETR Profile is the same process as in the Activation of the CTR Profile

Reading UE Trace

In OSS Common Explorer select Network Status Perspective. Select the root directory for LTE and all traces will show up. Select UETR Trace Reference and Messages to view details of UE Trace

QUESTIONS & COMMENTS