NOTICE These materials are prepared only for the

NOTICE! • These materials are prepared only for the students enrolled in the course Distributed Software Development (DSD) at the Department of Computer Science and Engineering, University of Mälardalen, Västerås, Sweden and at the Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia (year 2009/2010). • For all other purposes, authors’ written permission is needed! • The purpose of these materials is to help students in better understanding of lectures in DSD and not their replacement! 2021 -06 -05 1

Distributed Software Development 2021 -06 -05 2

Gordan Kreković NRTRDE Processing System Project Vision 2021 -06 -05 3

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Project Team • Team members: Stefano Cucchiella Muhammad Siddique Vijaya Cherukuri (TL) Tibor Takač Gordan Kreković (PL) • Project supervisor: Dr. sc. Igor Čavrak 2021 -06 -05 5

Customer RING logo is a trademark of Ring Datacom d. o. o. 2021 -06 -05 6

Roaming Data Exchange The usage by a subscriber in a visited network is captured in a file. Operator B Operator A ? ? ? Service provider The file has to be transferred to the home network. TAP Operator C Operator D 2021 -06 -05 > home network: Operator A > visiting network: Operator B ~48 h 7

This time frame is too long for efficient fraud detection! 2021 -06 -05 8

Solution: NRTRDE! • Near Real-Time Roaming Data Exchange – transfer of a NRTRDE file should occur within a time frame of 4 hours – carries information about the time and duration (volume) of events • This process can be efficiently used for fraud detection, but a mobile operator should have NRTRDE processing system. 2021 -06 -05 9

NRTRDE Processing System Operator B Service provider NRTRDE Processing System Operator A 2021 -06 -05 10

NRTRDE Processing System (Requirements) • Convert the ASN. 1 files into ASCII CSV format • Load data into a database schema • Rate of each record from the loaded file • Enable creation and modification of rating parameters for each roaming partner 2021 -06 -05 11

NRTRDE Processing System (Requirements) Enable creation of differnt reports • Generate a list of subscribers for suspension according to predefined criteria • Enable modification of criteria and parameter values for subscriber suspension 2021 -06 -05 12

NRTRDE Processing System (Architecture & Technologies) ASN. 1 to CSV converter (C, php, . . . ) (Postgre. SQL) Rating engine (UNIX) Reports Administration Application (php, HTML/CSS, . . . ) 2021 -06 -05 13

Out of the scope • The goal of this project is to develop NRTRDE processing systems – we are not solving NRTRDE files transfer problem • Processing system will not syncronize with other operator's systems – parameters will not be automatically updated from external source 2021 -06 -05 14

Hopes 2021 -06 -05 15

Thank you! 2021 -06 -05 16