Attaching Context-Aware Services to Moving Locations
IEEE Internet Computing
Location Based Services
Self location estimation scheme using ROA in wireless sensor networks
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Connectivity and RSSI based localization scheme for wireless sensor networks
ICIC'05 Proceedings of the 2005 international conference on Advances in Intelligent Computing - Volume Part II
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In this paper, we proposed a high precision location estimation algorithm using an intelligent coordination scheme in 2.45GHz RTLS and analyzed an average estimation error distance at 2D coordinates searching-area (300m×300m and 250m×250m). An average error distance was reduced as the number of available reader and received sub-blink increased. Proposed location estimation algorithm satisfied the RTLS specification requirements, 3m radius accuracy when the number of available reader is greater than 3 and the received sub-blink number exceeds 2 times in 250m×250m. Also, an average error distance was saturated within 0.5m~2.5m in case of 250m×250m when the number of available reader is greater than 4 regardless of the number of sub-blink. Also we confirmed that the 3m radius accuracy is 78 percent, and the 2.348m radius accuracy is 72 percent in 300m×300m searching-area when the number of available reader and received sub-blink was 8 and 4 times, respectively. In that case, we confirmed that 3m radius accuracy is 99 percent, and the 2.348m radius accuracy is 97 percent in 250m×250m searching-area.