Soongsil University

Lg Electronics Inc.

Korea Electrotechnology Research Institute

Yo An Shin

Kwang Yul Kim

Hak Seong Kim

E Rang Lim

Jian Shi

Ai Lan Hong

Ki Jun Kim

Seung-Woo Lee

Young Jin Park

Kwan Ho Kim

Soon Woo Lee

Ji Myung Kang

Ki Ho Lee

Won Cheol Lee

Kwang-Yul Kim

Hyung Min Chang

San Hae Kim

Oh Soon Shin

Shan Ai Wu

Mo Chan Yang

Xiang Li

A method for object position estimation based on a magnetic field using an underwater sensor network, includes: step of receiving a magnetic field signal that is emitted from an underwater moving object using an underwater sensor network which is configured with a plurality of magnetic field sensors in the water; step of extracting an induced magnetic field signal by removing a geomagnetic field and a noise signal from the received magnetic field signal; step of determining whether or not the moving object enters the underwater sensor network using the induced magnetic field signal; and step of estimating a position of the object using position information of the plurality of sensors that sense the object if it is determined that the object enters the underwater sensor network.

System for object position estimation based on magnetic field signal using underwater sensor network and method thereof

The present invention relates to a test node-based wireless positioning method and a device thereof, the method comprising the steps of mapping and storing the number and position coordinates of anchor nodes, which are within a set distance from a test node, for each of a plurality of test nodes set at uniform intervals in a space formed by a plurality of anchor nodes; acquiring each position coordinate of the anchor nodes, which are within the set distance from a unknown node to be positioned; comparing each of the acquired position coordinates of the anchor nodes and the position coordinates of the anchor node mapped on the test nodes, so as to select the test nodes of which the number of position coordinates coinciding with the anchor nodes greater than a threshold; and estimating the position of the unknown node by using the position coordinates of the selected test nodes.

Test node-based wireless positioning method and device thereof

A wireless positioning server using clock offset compensation and a wireless positioning method using the same. The wireless positioning server using clock offset compensation estimates a precise position of a tag requiring position information by effectively predicting information regarding a distance between a beacon for performing positioning and the tag requiring position information. An error in the positioning estimation result due to a clock offset is minimized by measuring a relative clock frequency ratio between beacons and by compensating for clock frequencies of the beacons when a distance between a beacon and a tag is estimated.

Wireless positioning server using clock offset calibration positioning method using the same

A method and an apparatus for performing hybrid automatic repeat request (HARQ) in a wireless communication system is provided. UEs that use the same application for D2D communications form a sharing group so that reliability of transmission of a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) among terminals that perform the D2D communications is guaranteed. In addition, among the terminals that perform the D2D communications, uplink transmission points in time determined in accordance with TDD configuration are checked and determined (calculated) so that the PUSCH and the PUCCH are correctly transmitted and received.

Method and apparatus for performing HARQ process in wireless communication system

The present invention relates to a virtual radio map constructing method for Radio-positioning and a device using the same. An exemplary embodiment of the present invention provides a virtual radio map constructing method, including: converting first and second RSS values obtained from two access points adjacent to each of a plurality of access points into first and second RSS values of a linear unit; respectively dividing first and second distances between the access point and the two access points adjacent thereto in an exponential interval, and respectively dividing the first and second RSS values in the exponential interval; generating a plurality of virtual training points by using a plurality of points divided in the exponential interval, and respectively obtaining RSS values of the plurality of virtual training points; and respectively obtaining RSS values of reference points by using RSS values of at least one virtual training points.

Virtual radio map constructing method and device using the same

Disclosed is a method for determining an indoor location which includes receiving signals including IDs and information on floors from a plurality of APs that is provided at floors of the multi-story building; measuring reception signal strengths of the received signals, and selecting candidate floors by using the measured reception signal strengths; predicting reception signal strengths of the other candidate floors by using the reception signal strengths of the APs provided at the respective candidate floors; and calculating variance values for the reception signal strengths of the candidate floors, and estimating a current location by using the variance values.

Apparatus for determining indoor location and method for determining indoor location in multi-story building using the same

A wireless localization method using a fingerprinting technique that performs localization by using a plurality of access points and a plurality of sample points arranged at regular distances, the wireless localization method includes: detecting first through third sample points adjacent to a predetermined node from among the plurality of sample points via the fingerprinting technique; calculating corrected coordinates by using a received signal strength (RSS) between the predetermined node and the first sample point, an RSS value between the predetermined node and the second sample point, an RSS value between the first and second sample points, an RSS value between the first and third sample points, and a distance between the plurality of sample points; and estimating a location of the predetermined node by reflecting the corrected coordinates on coordinates of the first sample point.

Wireless localization method and wireless localization apparatus using fingerprinting technique

Provided is a wireless positioning method using a wireless sensor network, for estimating a position of an unknown node that is a positioning target by using a plurality of anchor nodes arranged at regular intervals, the wireless positioning method including: setting a plurality of test nodes at regular intervals on a space formed by some of the plurality of anchor nodes; obtaining a number and position information of anchor nodes within a predetermined distance from the unknown node; detecting at least one test node matching the obtained number and position information; and estimating a position of the unknown node by calculating an average coordinate value of the detected at least one test node.

Wireless positioning method and apparatus using wireless sensor network

A method of a relay node transmitting data is provided. The method includes receiving scheduling information about a backhaul link and data from a base station; receiving channel information about an access link from relay node user equipment; performing scheduling on the access link based on the scheduling information about the backhaul link and the channel information about the access link; and relaying the data to the relay node user equipment according to a result of the scheduling. The backhaul link means a link between the base station and the relay node, and the access link means a link between the relay node and the relay node user equipment.

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Seoul, South Korea

Yo An Shin