Context Aware Fuzzy Rule Based Vertical Handoff Decision Strategies for Heterogeneous Wireless Networks

The 4 generation wireless communication systems aim to provide users with the convenience of seamless continuous connection to access various wireless technologies and to have the connection with the best network which provides the best Quality of service. To achieve this goal it is necessary to have a good decision making algorithm which decides the best network for a specific application under which vertical handoff should be performed. This paper proposes a QoS aware fuzzy rule based vertical handoff mechanism Using fuzzy logic quantitative decision algorithm (FQDA) is used as an handoff decision criteria to choose which network to handover among different available access networks. The QoS parameters considered are available bandwidth, end-to-end delay, jitter, and bit error rate (BER). Simulation results show that compared to other vertical handoff algorithms, the proposed algorithm gives better performance for different traffic classes.