The thesis presents managing steering of roaming subscribers in foreign mobile networks from technical and commercial point of view. At first, we present two kinds of mechanisms which are used for steering purposes. Next we will get familiar with practical execution of steering of roaming in company Si.mobil. In the initial part we explain what the prerequisites for execution of steering of roaming are. These include the commercial and technical procedures, like Roaming agreement, Discount agreement, interconnection, roaming services and billing procedures, basically all the processes which are needed for offering the roaming service to own customers and enable roaming of customers of our roaming partner. Next section is dedicated to basics of mobile networks and its functionalities. Main focus in this section is on signalization, since its understanding is needed for steering of roaming. Within signalization we illustrated the architecture of signaling system number 7, its protocol stack and protocols, which are the support for mobility in mobile networks. The trigger protocols for mobility are SCCP and MAP.
Main part covers the detailed picture of how technically the two types of steering works; the signaling based SoR and over-the-air steering OTA. Both approaches have to take into consideration their official PRD documents when implementing the steering solution. We also presented the key decision factor when adopting a roaming strategy for our outbound subscribers.
In the third, last chapter, we analyzed a practical case of steering in the Si.mobil company. Key performance indicators which have to be complied when monitoring the steering service and roaming quality are presented. How the key performance indicators are influenced by our requests on steering platform is explained in last part of this section.
The thesis concludes with showing and commenting the actual results of steering.