DiSA-CF: A distance-integrated self-attention model for collaborative filtering in web service recommendation

• Published in: Expert systems with applications 2025-01, Vol.259, p.125223, Article 125223
• Main Authors: Alinia, Masoumeh, Mohammad Hossein Hasheminejad, Seyed
• Format: Article
• Language: English
• Subjects: Collaborative filtering; Internet of Things (IoT); QoS prediction; Self-attention; Service recommendation
• ISSN: 0957-4174
• DOI: 10.1016/j.eswa.2024.125223

The ubiquity of the Internet of Things (IoT) across diverse applications underscore its pivotal role in seamlessly integrating physical devices to facilitate efficient data collection, analysis, and automation. Consequently, ensuring the Quality of Service (QoS) emerges as a critical imperative. While numerous studies have proposed methodologies focusing on resource optimization, network management, and data processing techniques, several previous approaches to QoS prediction may face constraints in the Internet of Things (IoT) environment, where the dynamic nature of IoT environments demands predictive models capable of adapting to varying conditions. Integrating user and service location data into QoS prediction models is paramount, as it enables personalized service delivery tailored to the user’s specific context, thus enhancing the user experience and overall system performance. This paper presents a novel approach to QoS prediction in IoT, harnessing self-attention and collaborative filtering (CF) techniques while incorporating location-based features such as distance from the user to the service. Experimental evaluations on benchmark datasets reveal that our proposed model improves prediction accuracy by up to 7 % compared to existing methods, underscoring its efficacy in enhancing QoS provisioning in IoT environments.