A Cross-Layer Vertical Handover Decision Model for Heterogeneous Wireless Networks

Vertical handover in heterogeneous wireless networks is a strategic decision due to its profound impact on mobile applications and their performance. Primarily it's an issue of network availability and secondarily it is a question of choosing best available service. This paper presents a Cross-layer Vertical Handover (CVH) decision model that maintains the pre-decision load of vertical handover processing on two layers i.e. application layer and a thin shim layer between the network and data link layer. A matchmaker service help in handover decision on the basis of best match of application demands with available connectivity options. The results show low-latency, highly consistent vertical handovers during mobility and improved performance of applications with respect to throughput and reliability.