Network Instruments GigaStor Portable, User Manual

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42 | GigaStor™ (pub. 25.Apr.2014)
Option Description
the 4G LTE memory configuration for the probe
instance, its default value is to show 50,000 devices. It
is possible that rejected devices may take up a large
portion of the 50,000 devices. You may want to either
choose to discard rejected devices or increase the
number of tracked devices. This is set in
Fine-tuning
the statistical buffer .
Filter IMSI Allows you to filter for a specific IMSI. Provide the
IMSI or a portion of the IMSI for which you want to
filter.
First/Last time seen display resolution Allows you to choose whether the display resolution
is 1 millisecond, 1 microsecond, or 1 nanosecond.
Display date Adds the date to the analysis output.
6. Click OK to save your settings.
7. Click
OK
to search the GigaStor for the 4G LTE traffic.
Analyzing 4G LTE traffic
By viewing the link between signaling and sessions on the data and user planes or by viewing detailed
information on each session, including subscriber, service area, cell site, network element, handset type, error
codes and session status, you will have excellent insight into your LTE network status.
Long Term Evolution (LTE) leverages the power of an IP infrastructure to significantly increase the performance
of mobile communications. Observer provides end-to-end tracking of flow and control data services of
LTE mobile communications and protocols. Carriers shifting to IP-based networks have complete visibility across
all points of their LTE infrastructure from the tower to the core.
Figure 8 (page 43) shows a user's mobile device connecting to eNodeB towers using radio frequency.
The MMEs manage the control planes that connect with the Evolved Packet Core for authorization and
authentication by using the HHS. The user plane is also handled separately by the MMEs for communication
such as web browsing, e-mail, call set up, VoLTE, and, in some environments, private networks. After a user
device is authenticated and connection established, the SGW manages the connection. As the user's device
moves from eNodeB to eNodeB that handoff is handled using X2.