Research Article
Scalability Optimization of Seamless Positioning Service
Table 1
Impact of proposed algorithm on positioning error in outdoor environment.
| Network | Estimator | Positioning error [m] | Basic fingerprinting | With map reduction | With map reduction and reduction of transmitters |
| GSM | NN | 144.78 ± 78.15 | 89.67 ± 64.61 | 89.67 ± 64.61 | GSM | KNN | 110.44 ± 71.02 | 92.42 ± 50.90 | 92.42 ± 50.90 | GSM | WKNN | 120.63 ± 69.18 | 85.10 ± 61.45 | 85.10 ± 61.45 | Wi-Fi | NN | 178.47 ± 47.57 | 18.20 ± 10.74 | 18.20 ± 10.74 | Wi-Fi | KNN | 181.24 ± 29.60 | 21.66 ± 13.18 | 21.66 ± 13.18 | Wi-Fi | WKNN | 181.42 ± 29.60 | 19.22 ± 8.70 | 19.22 ± 8.70 |
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