Vertical Handoff Decision Model for Next Generation Network Based on Cost Function
The Next Generation Wireless Networks (NGWNs) allows the mobile node to access in different wireless network for a high rate of services. Therefore, in future there will be a need to have decision algorithm to decide which network is the best for a specific application that the user needs. In this paper, the authors propose a vertical handoff decision algorithm to decide the "Best network" interface and "Best time" moment to handoff. In this a score function is calculated based on static factors (e.g. band width, power consumption and link cost) and dynamic factor (e.g. congestion, received signal strength, MT velocity and duration of a mobile node in a particular network) to make the vertical handoff decision.