At step 4 (54) the route election weighted factor (REWF) is calculated for each path, using the equation; REWF = ??? i = 1 n a i ??? ?? i ??? k where ai is the output of target mapping for i'th criterion for each route path, ??i is the priority value defined for each routing criterion in the routing algorithm, n is an integer and k is a normalization coefficient that can be predefined.