Patent application number | Description | Published |
20090052512 | LINK ADAPTATION SYSTEM USING DOPPLER FREQUENCY AND METHOD USING THE SAME - 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. | 02-26-2009 |
20090061783 | ACCESS POINT, MOBILE STATION FOR WIRELESS COMMUNICATION SYSTEM, AND METHOD FOR CONTROLLING THE SAME - An access point (AP) and a mobile station in a wireless communication system and a method of controlling the same are provided. A method of controlling an AP in a wireless communication system includes: determining whether a transmission of a control message is needed; transmitting the control message via a first frequency band when the transmission of the control message is needed; determining whether a transmission of a data message is needed; and transmitting the data message via a second frequency band when the transmission of the data message is needed | 03-05-2009 |
20090077241 | METHOD OF FORWARDING/SHARING SERVICE AND DEVICE OF ENABLING THE METHOD - 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 | 03-19-2009 |
20090082057 | COGNITIVE RADIO TERMINAL DEVICE AND METHOD OF COMMUNICATING USING COGNITIVE RADIO - 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. | 03-26-2009 |
20090092185 | PORTABLE DEVICE FOR PROCESSING MULTIMEDIA SIGNAL AND METHOD USING THE SAME - 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. | 04-09-2009 |
20090111385 | APPARATUS FOR DETERMINING INTERFERENCE USING CYCLIC PREFIX AND METHOD THEREOF - 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. | 04-30-2009 |
20090111525 | MINI BASE STATION CONNECTABLE WITH INTERNET AND TERMINAL - 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. | 04-30-2009 |
20090117914 | FREQUENCY SPECTRUM SENSING METHOD USING PILOT SIGNAL AND COGNITIVE RADIO SYSTEM USING THE SAME - 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. | 05-07-2009 |
20090186646 | COGNITIVE RADIO COMMUNICATION METHOD FOR CONTROLLING SENSING OPERATION AND COGNITIVE RADIO COMMUNICATION APPARATUS ENABLING THE METHOD - 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. | 07-23-2009 |
20110110285 | SYSTEM AND METHOD FOR TRANSMITTING DATA IN A MULTI-CELL NETWORK - 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. | 05-12-2011 |
20140021942 | METHOD AND APPARATUS FOR CREATING MAGNETIC FIELD MAP BASED ON FLOOR PLAN INFORMATION OF BUILDING - 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. | 01-23-2014 |
20140025334 | TERMINAL AND SERVER FOR MODIFYING MAGNETIC FIELD AND METHOD THEREOF - 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. | 01-23-2014 |
20140073350 | USER TERMINAL AND METHOD FOR PROVIDING SERVICE FOR ESTIMATING LOCATION BASED ON CHANGE IN STATE OF USER TERMINAL - 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. | 03-13-2014 |
20140113664 | METHOD OF SETTING INITIAL LOCATION OF USER TERMINAL VIA INTERACTION WITH USER AND USER TERMINAL - 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. | 04-24-2014 |
20140162703 | MOBILE DEVICE FOR ESTIMATING LOCATION USING PARTICLE FILTER GENERATED BASED ON THREE-DIMENSIONAL (3D) MAGNETIC FIELD MAP AND METHOD USING SAID MOBILE DEVICE - 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. | 06-12-2014 |
20140172356 | METHOD FOR ESTIMATING LOCATION OF USER TERMINAL USING DIFFERENCE BETWEEN TRUE NORTH AND MAGNETIC NORTH AND THE USER TERMINAL THEREOF - A method of estimating a location of a user terminal is provided. It is based on a difference between a true north and a magnetic north that may estimate a location of a user terminal on a magnetic field map based on a difference between a true north and a magnetic north corresponding to each location of the magnetic field map, and the user terminal thereof. | 06-19-2014 |