  One of the features of the Next Generation Wireless Networks (NGWNs) is its
heterogeneous communication environment. Heterogeneous networks are ranging
from wireless WAN, LAN, MAN and PAN. The most important parameters in this
regard are different data rates and coverage of these networks. In this paper,
we propose an evolvable fuzzy logic-based algorithm for managing handover
process in heterogeneous wireless networks. We use fuzzy logic system to
determine the right time of initiating the handoff procedure and utilize
Genetic Algorithm (GA) to predict the best form of rules of the fuzzy module.
We implement our proposed scheme on a special simulation model and discuss
about the impact of evolution on the algorithm.
