User Guide

3 TEMS™ VISUALIZATION 7.2 PROFESSIONAL
Call Event Analyzer
The Call Event Analyzer makes every call within the recorded cell set
available for detailed analysis. It allows the operator to see the major events
associated with a particular call in a history view. Using powerful filtering
and sorting functions, it displays the flow of handovers as either an event
list or plotted on a map. Calls with abnormal events (dropped, blocked,
handover failure, etc.) are easily identified.
TEMS Visualiza tion Professional works with data gathered by the
Ericsson OSS-RC. Supported for mats are GPEH and UETR for WCDMA net-
works, and R- PMO, MTR, and CTR f or GSM. TEMS Visualization Professional
is compatible with the newest enhancements added on the event side
for both technologies. TEMS Visualization Professional follows calls over
BSC borders, allowing the user t o analyze Intra-BSC handovers and follow
all calls made in the recording area. It is now also possible to trace calls
between WCDMA and GSM.
By using TEMS Visualization, operators can do the following, and much
more:
▪ Optimize daily worst cells.
▪ Validate channel allocation (e.g. AMR, overlaid/underlaid optimization).
▪ Filter out calls originating from a selected cell and follow the movement
of each call.
▪ Find the location of dropped calls by following the progression of
serving cells.
▪ Optimize WCDMA neighbor plans.
▪ Identify problems where only one link suffered from poor quality
(uplink and downlink measurement data are available in the tool).
▪ Determine poorly performing mobiles or mobile types.
▪ Analyze problems dependent on response time using the time
difference histogram feature.
In addition, it is easy for the operator to follow the events, radio
environment, and graphical presentation of the serving cell for every call.
This helps operators identify the real reasons for dropped calls, understand
traffic patterns, find missing neighbors, identify ping-pong handover areas,
and perform a host of other optimization activities.
For WCDMA, it is also possible to keep track of the signaling between
the mobile and the core network. Selected information elements are de-
coded such as the cause value for any location or routing area update reject.