Network Routing: Algorithms, Protocols, and Architectures
Network Routing: Algorithms, Protocols, and Architectures
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Number portability provides users the capability to keep their telephone numbers as they moves to another provider. Number portability technology involves complicated architecture between different providers. From a routing perspective, and in order to simplify the model, we consider that the traversal of a call to a ported number may involve three different networks: the Originating Network, the Donor Network, and the Recipient Network. In this work, we consider four routing schemes, Onward Routing (OR), Query on Release (QoR), Call Dropback/Return to Pivot (CD/RtP), and All Call Query (ACQ) for number portability. We present preliminary results on their performances under various scenarios from a connection setup delay point of view when the rate of portability changes.