무선 센서망에서 노드의 클럭 주파수 오차에 둔감한 이동노드의 위치추정 방식
남윤석, 허재두, 박광로
- 8862430 (2014.10.14)
- There is provided a method for estimating a position of a mobile node in a wireless sensor network. The method includes estimating a frequency offset between anchor nodes and estimating a difference between times when ranging frames from a mobile node are received by two anchor node, without use of a separate synchronization unit, such as a network synchronized clock supply unit that supplies a network synchronized clock via a cable, in a wireless sensor network, unlike a conventional method of estimating Time of Flight (TOF) using Two-Way Ranging (TWR) and Symmetric Double Sided-TWR (SDS-TWR) schemes. The estimated receiving time difference is directly applied to a Time Difference Of Arrival (TDOA) algorithm in order to estimate the position of the mobile node.
- KSP 제안 키워드
- Conventional methods, Double-sided, Mobile node(MN), SDS-TWR, Sensor networks, Synchronization Unit, Time Difference of Arrival(TDOA), Two-way ranging, Wireless sensor networks(WSNs), anchor nodes, difference of arrival, directly applied, frequency offset, time difference, time-of-flight(TOF), two-way, wireless sensor