186 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
is can be a disadvantage when, for example, the influence of metrics over the user’s percep-
tion may vary or when it is necessary to introduce a negative metric, i.e., a metric that must be
maximized, while the others must be minimized.
A solution to this problem may be an adaptive weighted sum method [25] that focuses on
unexplored regions changing the weights in an adaptive way instead of using predefined val-
ues. us, this method “learns” the shape of the Pareto front, and the computational effort is
focused on the regions where relevant information can be attained more efficiently. In addition,
this method makes it possible to explore nonconvex regions, where the traditional ...