Abstract:
Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information.
Abstract:
A method of setting an initial location of a user terminal via an interaction with a user and a user terminal is provided. The method includes measuring a magnetic field at a current location of the user terminal, and estimating a candidate initial location of the user terminal based on the magnetic field. The method further includes displaying the candidate initial location, and selecting the candidate initial location. The method further includes setting the initial location based on the selection.
Abstract:
A method of setting an initial location of a user terminal via an interaction with a user and a user terminal is provided. The method includes measuring a magnetic field at a current location of the user terminal, and estimating a candidate initial location of the user terminal based on the magnetic field. The method further includes displaying the candidate initial location, and selecting the candidate initial location. The method further includes setting the initial location based on the selection.
Abstract:
A method of estimating a location of a terminal includes measuring a magnetic field value at a location of the terminal, estimating the location of the terminal using the measured magnetic field value, and transmitting the measured magnetic field value and information associated with the estimated location to a server. A method of modifying a magnetic field map includes receiving, from a terminal, a magnetic field value estimated at a location of the terminal, and information associated with a location of the terminal estimated based on the magnetic field value, and modifying a magnetic field map using the measured magnetic field value and the information associated with the estimated location.
Abstract:
A method of obtaining a location of a user includes obtaining first location information of the user; searching a pre-stored first map for a plurality of candidate areas corresponding to the first location information; selecting at least one search area from the plurality of candidate areas corresponding to the first location information based on second location information of the user; and determining the location of the user using at least one search area.
Abstract:
A mobile device includes a magnetic field sensor configured to measure a magnetic field value at a location of the mobile device, and a memory configured to store first magnetic field maps corresponding to a number N of respective heights. The mobile device includes a magnetic field map deriving unit configured to derive second magnetic field maps corresponding to a number M of respective heights based on the first magnetic field maps, the number M being greater than the number N, and a location determining unit configured to determine the location of the mobile device based on the magnetic field value and the second magnetic field maps.
Abstract:
Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information.
Abstract:
Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information.