Exploiting Vertical Handoffs in Next Generation Radio Resource Management

Vertical Handoffs occur when a user changes association from one type of wireless access technology to another while maintaining an active session. Much work has been done in ensuring seamless handoffs that also preserve QoS. However, service providers can exploit vertical handoffs as a Radio Resource Management (RRM) means to relieve congestion, load balance and uphold QoS requirements. Nevertheless, this exploitation requires rigorous study in order to realize its full potential. In this paper, we advocate the use and study of forced vertical handoffs as a powerful RRM tool. We also discuss the different factors involved in the design and operation a forced vertical handoff module (FVHM). Furthermore, we provide a RRM framework for future wireless network where an FVHM is employed and set to interact with a bandwidth adaptation algorithm. In the framework, we introduce the Willingness function, a novel representation for a user´s instantaneous willingness to undergo a forced vertical handoff.