Predicting quality of service for selection by neighborhood-based collaborative filtering

Jian Wu, Liang Chen, Yipeng Feng, Zibin Zheng, Meng Chu Zhou, Zhaohui Wu

Research output: Contribution to journalArticlepeer-review

194 Scopus citations


Quality-of-service-based (QoS) service selection is an important issue of service-oriented computing. A common premise of previous research is that the QoS values of services to target users are supposed to be all known. However, many of QoS values are unknown in reality. This paper presents a neighborhoodbased collaborative filtering approach to predict such unknown values for QoS-based selection. Compared with existing methods, the proposed method has three new features: 1) the adjusted- cosine-based similarity calculation to remove the impact of different QoS scale; 2) a data smoothing process to improve prediction accuracy; and 3) a similarity fusion approach to handle the data sparsity problem. In addition, a two-phase neighbor selection strategy is proposed to improve its scalability. An extensive performance study based on a public data set demonstrates its effectiveness.

Original languageEnglish (US)
Pages (from-to)428-439
Number of pages12
JournalIEEE Transactions on Systems, Man, and Cybernetics Part A:Systems and Humans
Issue number2
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Software
  • Information Systems
  • Human-Computer Interaction
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Science Applications


  • Neighborhood-based collaborative filtering (CF)
  • Quality-of-service (QoS) prediction
  • Service selection


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