Next generation wireless networks need seamless handoff between different wireless networks. Suitable vertical handoff algorithm may make seamless handoff possible in heterogeneous networks. We evaluate performance of received signal strength (RSS) based vertical handoff (VHO) in a new heterogeneous network model. To compare RSS of different network, the method based on corresponding bandwidth in each network has been considered in this paper. Further the RSS based VHO algorithm has been modified considering averaging of RSS. We evaluate the performance of the modified VHO algorithms in our proposed network model in terms of decision delay and number of handoff. For comparison purposes, the performance of the VHO algorithm that does not consider averaging of RSS has also been shown.
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