Abstract:

How to accurately predict Web service QoS (Quality of Service) has recently become a hot research topic. Considering the influence of user locations on Web service QoS, some studies have proposed a couple of locationaware Web service QoS prediction methods. However, the relationship between Web service QoS and user locations is rarely empirically investigated. Therefore, an empirical study for evaluating the relationship between them is carried out, and a set of experiments on a real dataset of Web service QoS is constructed. Experimental results show that two users that are close in location are likely to observe similar QoS values on the same set of Web services, and vice versa. These findings confirm the strong correlation between Web service QoS and user locations, which can provide important evidences for the effectiveness of locationaware Web service QoS prediction.

Key words: Web services;QoS;location;correlation;prediction