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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.
- KSP Keywords
- Distance estimate, Mobile node(MN), Sensor networks, Synchronization Unit, Time Difference of Arrival(TDOA), Wireless sensor networks(WSNs), anchor nodes, difference of arrival, frequency offset, network Synchronization, passive mode, position recognition, time difference, wireless sensor