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Detail
Registered METHOD OF ESTIMATING POSITION OF MOBILE NODE IN WIRELESS SENSOR NETWORK
- Inventors
- Nam Yoon Seok, Huh Jae Doo, Park Kwang Roh
- Application No.
- 12866917 (2008.10.10)
- Publication No.
- 20110007650 (2011.01.13)
- Registration No.
- 8543132 (2013.09.24)
- Country
- UNITED STATES
- Project Code
- 07MH2800, Development of HD Class Multimedia System Technology over Wireless Home Network, Huh Jae Doo
- Abstract
- The present invention relates to a method of estimating the position of a mobile node in a wireless sensor network using a passive mode OWR method. The method includes: estimating frequency offsets of anchor nodes and a mobile node; allowing the anchor nodes to sequentially transmit ranging frames; allowing the mobile node to receive the ranging frames and to estimate the difference between the reception times of signals from two anchor nodes; and applying the estimated difference between the reception times of the signals to time difference of arrival (TDOA) to estimate the position of the mobile node. According to the above-mentioned structure of the present invention, a plurality of mobile nodes can estimate their positions with a minimum number of ranging frame transmissions, without using a separate network synchronization unit. In addition, it is possible to easily construct a wireless sensor network for position recognition, and rapidly and accurately perform distance estimate using an OWR method.