Research Article
An Adaptive Window Size Selection Method for Differentially Private Data Publishing over Infinite Trajectory Stream
(a) Original trajectories of vehicles |
| | t1 | t2 | t3 | t4 | t5 | ∙∙∙ |
| v1 | Olympic highway | | | | Sogang bridge | ∙∙∙ | v2 | | Sogang bridge | | | Olympic highway | ∙∙∙ | v3 | Olympic highway | Teheran street | Hongik university | | Sogang bridge | ∙∙∙ |
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(b) Aggregated traffic data |
| | t1 | t2 | t3 | t4 | t5 | ∙∙∙ |
| Olympic highway | 2 | 0 | 0 | 0 | 1 | ∙∙∙ | Teheran street | 0 | 1 | 0 | 0 | 0 | ∙∙∙ | Sogang bridge | 0 | 1 | 0 | 0 | 2 | ∙∙∙ | Hongik university | 0 | 0 | 1 | 0 | 0 | ∙∙∙ |
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