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: 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 user terminal and a method for providing a service for estimating a location based on a change in a state of the user terminal, are provided. The method includes sensing a change in a state of a terminal while an application that provides the service of estimating the location is being executed, and extracting one or more resources affected by the change from a plurality of resources to be used to provide the service. The method further includes filtering data corresponding to the one or more affected resources, and providing data to the application based on the filtering.

Abstract: A link adaptation system using a Doppler frequency is provided. The link adaptation system includes: a Doppler frequency estimation unit to estimate a Doppler frequency of a signal transmitted via a wireless channel; a Signal to Noise Ratio (SNR) measurement interval determination unit to determine an SNR measurement interval of the signal transmitted via the wireless channel based on the estimated Doppler frequency; and an SNR measurement unit to measure an SNR of the signal based on the determined SNR measurement interval.

Abstract: Provided are a method and an apparatus for creating a magnetic field map that extracts magnetic field information of a building from floor plan information of the building. The magnetic field map of the building may be generated based on the floor plan information and the magnetic field information.

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 receiver for nano communication includes a power source including a cathode and an anode; a cathode unit connected to the cathode of the power source, the cathode unit including a nano device configured to receive a wireless signal modulated according to a predetermined modulation scheme, have at least two different resonant frequencies, and resonate based on a frequency of the wireless signal and the at least two different resonant frequencies; and an anode unit connected to the anode of the power source, the anode unit being configured to detect electrons emitted from the nano device, and demodulate a the wireless signal based on a pattern of the detected electrons.

Abstract: An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix.

Abstract: Provided is a communication method of a base station and a target terminal. Resources used for a channel feedback may be reduced by determining a wireless resource based on information about a channel and information about a mobility of the target terminal in each of at least one route, and by feeding back channel state information.

Abstract: A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system.

Abstract: A terminal apparatus for forwarding/sharing a data service is provided. The terminal apparatus for forwarding/sharing the data service includes a service receiver to receive the data service from a service provision apparatus; a connector to perform a connection with a corresponding terminal; and a service forwarding unit to forward the data service to the corresponding terminal via the connection with the corresponding terminal.

Abstract: A communication system and method that receives data from a terminal using a cooperative reception scheme, is provided. Each terminal may generate multi-cell transmission data used for overcoming transmission delay and transmit, to each base station, a data frame including the multi-cell transmission data.

Abstract: A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system.

Abstract: An operation method of a radio communication station is provided. The operation method of a radio communication station, the operation method including: transmitting a basic pilot signal to at least one terminal located in a coverage of a preoccupied system; and transmitting a cognitive radio (CR) pilot signal.

Abstract: A mini base station connectable with the Internet including a frequency recognition unit to recognize a frequency band of an external signal transmitted from a cellular base station; and an operation frequency determination unit to determine an operation frequency band according to interference generated with the cellular base station based on the recognized frequency band of the external signal.

Abstract: An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix.

Abstract: A portable device for processing a multimedia signal is provided. The portable device includes: a signal receiver to receive a multimedia signal from a mobile terminal, the multimedia signal being received in the mobile terminal from a service providing server; a decoding-related information generation unit to generate decoding-related information which is related to at least one of a codec and a resolution; a decoder to decode the multimedia signal according to the decoding-related information, and to generate multimedia information; and a multimedia information transmitter to transmit the multimedia information to an external display device.

Abstract: A cognitive radio terminal device. The cognitive radio terminal device comprises an available radio resource determination unit to determine an available radio resource from among up-link radio resources assigned to an up-link communication in a primary network, and an ad hoc communication performing unit to perform an ad hoc communication in a secondary network by using the available radio resource.

Abstract: A terminal apparatus for forwarding/sharing a data service is provided.

Abstract: An access point (AP) and a mobile station in a wireless communication system and a method of controlling the same are provided.