Download Multi-Protocol Correlation: Data Record Analyses and Correlator

CHAPTER 1. INTRODUCTION
SIP [13], Media Gateway Control Protocol (Megaco) [11] and CAP [16]. They
are all application layer protocols, and they are all deeply involved in setting up
and terminating calls, or working as a bridge in between the different protocols in
today’s telecommunication network. It is these four protocols that this thesis will
focus on when trying to correlate signaling data.
Figure 1.2: Utel Systems illustration of an example system
The image in Figure 1.2 how Utel Systems imagines the overall system for
data gathering. Our work in this thesis will be limited to the two lower halves of
the Figure, xDR correlation and end-to-end correlation. In both of those cases the
actual correlation process is performed on xDRs.
In summary; this thesis consists of the following tasks:
• Describe a general model for end-to-end correlation of xDRs. The design
should be as generic as possible, but focusing on a limited number of protocols; ISUP, SIP, Megaco and CAP.
• Propose a method to match data records from these protocols by investigating the similarities between different networks and protocols.
• Identify and discuss challenges related to:
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