Network Selection Algorithm based on Multi-radio Parallel Transmission for Heterogeneous Wireless Networks

To make full use of radio resources in heterogeneous wireless networks, a network access selection algorithm based on multi-radio parallel transmission is proposed. The algorithm firstly determines all available wireless networks according to received signal power from base stations, and considers every subset of these networks as a network selection scheme. Then we calculate the aggregation attribute of every scheme to confirm the candidate network schemes which are limited by the throughput and power consumption threshold. The matrix of multiple attribute decision making is built and the optimal scheme to access is determined based on cost function value of every network scheme by using TOPSIS algorithm with user preference. The distance between the optimal scheme and the ideal scheme is the nearest. The simulation results show that the proposed algorithm can obviously improve user quality of service, improve user throughput, reduce power consumption per bit and price cost per bit, and keep network load balanced.