Title :
Service Selection Based on Personalized Preference and Trade-Offs among QoS Factors and Price
Author :
Xiaoqing Liu ; Fletcher, K.K. ; Mingdong Tang
Author_Institution :
Comput. Sci. Dept., Missouri Univ. of Sci. & Technol., Rolla, MO, USA
Abstract :
With the number of services with similar functionalities rising, service users place more emphasis on non-functional attributes of services such as quality of service (QoS) and price during service selection. However, previous QoS-driven service selection methods seldom consider relationships among non-functional requirements and do not allow explicit specification of personalized preferences and trade-offs from user perspectives to select services. In addition, most of them use weighted summation functions to aggregate multiple QoS factors to rank services for selection. This paper presents a novel service selection method, in which users can represent their non-functional requirements using linguistic terms and use their personalized trade-off strategies for service selection. The method employs fuzzy propositions in conjunction with QoS and price information to compute satisfaction degree of individual non-functional requirements. Based on the personalized trade-off strategy of a user, it then computes the overall satisfaction degree using fuzzy connective operators. The overall satisfaction degree of services is then used to rank services with equivalent functionalities and top-ranked services are recommended. An application example is presented to show the method´s effectiveness.
Keywords :
Internet; quality of service; QoS factors; QoS-driven service selection method; aggregate multiple QoS factor; fuzzy connective operators; fuzzy proposition; linguistic terms; nonfunctional attributes; nonfunctional requirement; personalized preference; personalized trade-off strategy; price information; quality of service; rank services; summation function; top ranked services; Availability; Fuzzy logic; Pragmatics; Quality of service; Throughput; Time factors; QoS; elastic non-functional requirements; fuzzy logic; personalized preference; personalized trade-off; service selection;
Conference_Titel :
Services Economics (SE), 2012 IEEE First International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4673-3048-0