Vertical handover is the evolving concept in 4G for seamless communication
between heterogeneous networks. In this paper, our main objective is to analyze
handover between two WLAN, two Wimax, two UMTS networks. The vertical
handover decision is taken based on the variance based algorithm, which
calculates the variance of parameters such as delay, jitter, bandwidth and packet
loss for various above mentioned networks and the network with most of the
parameters with minimum variance is selected. This algorithm is also compared
with other algorithms such as MEW (Multiplicative experiment weighting),
SAW (Simple Additive Weighting), TOPOSIS (Technique for order preference
by similarity to ideal solution) and GRA (Grey Relational Analysis). These
algorithms are appropriate for different traffic classes. Simulation results for
proposed variance based algorithm in Matlab is discussed and compared with
other Multiple attribute decision making algorithm basis of bandwidth; jitter,
delay etc. are discussed in the paper. It can be seen that the proposed variance
algorithm gives less packet delay than all the algorithms, Jitter is also is least
than all the other algorithms.
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