Network selection algorithm based on group decision making for heterogeneous wireless networks

Multimode terminals running multiple services at the same time are increasingly common, in response to this phenomenon, a network selection algorithm based on group decision making for heterogeneous wireless networks is presented in this paper. The algorithm considers each service from the terminal as a decision-maker, and obtains the weight vector of all network attributes for each service by the analytic hierarchy process, then uses the group decision making to synthesize these weight vectors. At the same time, the utility function is used to normalize the network attributes. At last, the network selection is made according to the synthesized weight vector and attribute utility. The simulation results show that the proposed algorithm is far superior to the TOPSIS in satisfying the QoS requirements of different class of services, and can solve the problem of network selection for a group of services from a multi-service terminal.