关键词: 异质网络, 服务质量, 层次分析法, 理想值近似性排序法, 网络负载

Abstract: To meet the needs of Quality of Service (QoS) guarantee in heterogeneous wireless network selection, the relative importance of QoS parameters for each class of traffic defined by 3GPP was analyzed, and the QoS parameter weight for each class of traffic was calculated by Analytic Hierarchy Process (AHP). Then, a Traffic-class Oriented Differentiate Weight Algorithm (TODWA), which was based on the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), was proposed for heterogeneous wireless networks selection. At last, simulation results show that TODWA is better than average weight algorithm on deciding target network reasonably and balancing network loads efficiently.

Key words: heterogeneous network, Quality of Service (QoS), Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), network load