Multi-attribute Group Decision Making-Based Decentralized Web Service Selection

In ubiquitous network environment, network and resources change frequently, the capabilities of devices are quite different. All these features lead to local characteristics of QoS (quality of service). In addition, the centralized service registry and service selection methods cannot adapt to ubiquitous network environment. Therefore, this paper presents a decentralized Web services selection algorithm based on multi-attribute group decision making (MAGDM) theory (DWSSA_MAGDM). Firstly the definitions of the heterogeneous user´s and service´s context ontology are given. Then a service optimal selection algorithm is given. The algorithm includes standardization of the heterogeneous decision-making matrix, aggregation of the QoS evaluation and synthetically evaluation. Experimental results show that the DWSSA_MAGDM works well for ubiquitous network environment.