A Multi-restrained Terminal-controlled Access Network Selection Strategy

Keyword: heterogeneous wireless networks; access network selection; multiple restrictions; cost function; parallel transmission Abstract. Next generation network must be a situation that a variety of RATs (radio access tech- nologies) coexist and integrate. Aiming at improving user's QoS (Quality of Service) effectively, a mobile terminal access network selection strategy with multi-constraint conditions is proposed. Based on the preferences of user and QoS standards of multiple access networks, the strategy con- sidered different types of business and their priorities at the same time, and given the cost function for each wireless network. According to the minimum and best principle, the Strategy selected the most suitable network combinations to do parallel transmission. Simulation results show that the strategy can greatly improve the data transfer rate, as well as decrease the traffic blocking rate.

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