Abstract
The implementation of heterogeneous base stations in addition to the traditional macro cell architecture is considered as an additional amenity to existing resources in order to provide a greater capacity and Quality of Service to the mobile users. The future topology of these networks is foreseen as a combination of such networks creating a heterogeneous network. In such a topology, a user will be seamlessly mobile between all available networks and will have to perform a large number of vertical handovers. Due to sensitive timing of handover execution, the ping pong effect may lead to unsuccessful handovers, destroying the purpose of seamless connectivity. This paper presents a new history-based communication graph scheme to perform vertical handover. The proposed scheme has shown a greater number of successful handovers thus reducing the ping pong effect in heterogeneous networks.
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