Date Added: Oct 2012
Next generation networks are envisioned to be heterogeneous in nature with an increase in demand towards ubiquitous services in wireless networks. As various networks have widely different characteristics, it is difficult to maintain the Quality of Service (QoS) after executing a handoff from one network to another network. Maintaining the QoS, based on applications, during the handoff in heterogeneous networks needs an intelligent handoff decision mechanism. This paper proposes a QoS-aware fuzzy rule-based vertical handoff mechanism that makes a multi-criteria-based decision, found to be effective for meeting the requirements of different applications in a heterogeneous networking environment. The QoS parameters considered are available bandwidth, end-to-end delay, jitter, and bit error rate.