Network Selection for Accessing Multiple Services Simultaneously under Heterogeneous Wireless Network Environment

摘要

With the development of wireless network technology, heterogeneous wireless networkis ubiquitous. Thus, selection of an optimal access network canmeet the demands of customersto the highest degree. A non-optimal network selection can result in bad effects such as poor service or higher cost.The traditionalapproach for network selection is based on Received Signal Strength (RSS). However, this paper aims to propose a Multi AttributesDecisionMaking (MADM) algorithm,which combined the parameters of network quality, system state, terminal state and user preferences, to select the optimal network for Accessing Multiple Services Simultaneously (AMSS).This paper analyzesservices classification,handoff related network attributes and the strong association attributes of services, and concerns both of the objective weights and subjective weights when calculating the attributes weights under AMSS. This proposal uses Entropy Method to assign the objective weights and Analytic Hierarchy Processto assign the subjective weights. In the end of this article, a Matlab simulation is performed to evaluate theproposed network selection mechanism based on Technique for Order Preference by Similarity to Ideal Solution(TOPSIS).