High Order Collaboration-Oriented Federated Graph Neural Network for Accurate QoS Prediction
This work addresses QoS prediction for cloud service selection with privacy concerns, representing an incremental improvement over existing federated graph neural network methods.
The paper tackles the problem of predicting Quality of Service (QoS) for cloud services while preserving user privacy by addressing the limitation of existing federated graph neural networks that fail to utilize implicit user-user interactions. It proposes HC-FGNN, which achieves high prediction accuracy and privacy protection as demonstrated in experiments on two real QoS datasets.
Predicting Quality of Service (QoS) data crucial for cloud service selection, where user privacy is a critical concern. Federated Graph Neural Networks (FGNNs) can perform QoS data prediction as well as maintaining user privacy. However, existing FGNN-based QoS predictors commonly implement on-device training on scattered explicit user-service graphs, thereby failing to utilize the implicit user-user interactions. To address this issue, this study proposes a high order collaboration-oriented federated graph neural network (HC-FGNN) to obtain accurate QoS prediction with privacy preservation. Concretely, it magnifies the explicit user-service graphs following the principle of attention mechanism to obtain the high order collaboration, which reflects the implicit user-user interactions. Moreover, it utilizes a lightweight-based message aggregation way to improve the computational efficiency. The extensive experiments on two QoS datasets from real application indicate that the proposed HC-FGNN possesses the advantages of high prediction accurate and privacy protection.