selection algorithms, the theory of Markov model has been used. Performance metrics can
be derived from the steady state probabilities of a Markov model. This paper extends a User
Level Markov model for a three colocated RATs system from existing two co-located RATs
Markov models. The service based RAT selection algorithm has been studied using the
proposed Markov model. Numerical results obtained from the proposed Markov model are …