Abstract
With the rapid development of Internet of Things, mobile edge computing which provides physical resources closer to end users has gained considerable popularity in academic and industrial field. As the number of edge server increases, accessing effective edge services fast is an urgent problem to be solved. In this paper, we mainly focus on the cold-start problem for service recommendation based on location of users and services. Address this conundrum, we propose a service recommendation method based on collaborative filtering (CF) and location, by comprehensively considering the characteristic of services at the edge, mobility and demands of users at different time periods. In detail, we synthesize the service characteristics of each dimension in different time slices through multidimensional weighting method at first. Then We further introduce the idea of Inverse CF Rec to the traditional CF and predict the lost quality of service (QoS) to solve the problem of sparse data. Finally, a recommendation algorithm based on predicted QoS and user geographic location is proposed to recommend appropriate services to users. The experimental results show that our multidimensional inverse similarity recommendation algorithm based on time-aware collaborative filtering (MDITCF) outperforms Inverse CF Rec in terms of the accuracy of recommendation.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 61702334, 61772200), the Project Supported by Shanghai Natural Science Foundation (Nos. 17ZR1406900, 17ZR1429700) and the Planning Project of Shanghai Institute of Higher Education (No. GJEL18135)
Funding
National Natural Science Foundation of China (Nos. 61702334, 61772200). Shanghai Natural Science Foundation (Nos. 17ZR1406900, 17ZR1429700). The Planning Project of Shanghai Institute of Higher Education (No. GJEL18135)
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Yu, M., Fan, G., Yu, H. et al. Location-based and Time-aware Service Recommendation in Mobile Edge Computing. Int J Parallel Prog 49, 715–731 (2021). https://doi.org/10.1007/s10766-021-00702-5
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DOI: https://doi.org/10.1007/s10766-021-00702-5