Abstract: A device and method for providing recommended words for a character input by a user are provided. The method by which the device provides recommended words includes: receiving an input for inputting a character in a character input window; recommending at least one pseudo-morpheme including the input character by analyzing the input character; recommending at least one extended word including a selected pseudo-morpheme in response to receiving an input for selecting one of the at least one pseudo-morpheme; and displaying a selected extended word in response to receiving an input for selecting one of the at least one extended word.

Abstract: A display device including: scan lines including first and second scan lines; pixels connected to the scan lines; photo sensors connected to some of the scan lines, the photo sensors including a first photo sensor connected to the first scan line and a readout line, and a second photo sensor connected to the second scan line and the readout line; a scan driver to provide scan signals to the scan lines; and a readout circuit to receive, through the readout line, detection signals which are outputted from the photo sensors in response to the scan signals, wherein, while the scan signals are provided to the first and second scan lines, the readout circuit samples a detection signal of one of the first photo sensor and the second photo sensor without sampling a detection signal of the other one of the first photo sensor and the second photo sensor.

Abstract: A dynamic channel assignment method includes receiving, at a ground control station (GCS), assignment of a first communication channel set from a spectrum authority before takeoff of the unmanned aircraft; receiving, at the GCS, assignment of a second communication channel set when the unmanned aircraft is to move from a first area using the first communication channel set to a second area using the second communication channel set due to a flight plan of the unmanned aircraft after takeoff of the unmanned aircraft; and after the unmanned aircraft enters the second area, maintaining, at the GCS, the first communication channel set when the unmanned aircraft reenters the first area due to the flight plan, and returning, at the GCS, the first communication channel set to the spectrum authority when the unmanned aircraft does not reenter the first area due to the flight plan.

Abstract: An operation method of a first communication node may comprise: establishing a first wireless connection with a GCS; establishing a second wireless connection with the GCS; transmitting and receiving data to and from the GCS through a first end-to-end connection based on the first wireless connection; reporting a communication quality of the first wireless connection to the GCS; receiving a link switch request from the GCS; switching a link from the first wireless connection to the second wireless connection based on the link switch request; and transmitting and receiving data through a second end-to-end connection based on the second wireless connection.

Abstract: A method of a base station may comprise: mapping at least one port of the base station to each of a plurality of user equipments (UEs) to be overloaded; configuring overloading signatures for a code division multiplexing (CDM) scheme; mapping the overloading signatures with the plurality of UEs to be overloaded, respectively; transmitting a message including configuration information of the overloading signatures to the plurality of UEs; and transmitting, to the plurality of UEs, signals multiplexed by the CDM scheme using the overloading signatures.

Abstract: A method and device for transmitting and receiving signals with a terrestrial station by using a radio frame including five subframes each of which includes a plurality of slots used for the uplink signal and/or the downlink signal are provided.

Abstract: An operation method of a first communication node may comprise: establishing a first wireless connection with a GCS; establishing a second wireless connection with the GCS; transmitting and receiving data to and from the GCS through a first end-to-end connection based on the first wireless connection; reporting a communication quality of the first wireless connection to the GCS; receiving a link switch request from the GCS; switching a link from the first wireless connection to the second wireless connection based on the link switch request; and transmitting and receiving data through a second end-to-end connection based on the second wireless connection.

Abstract: A dynamic channel assignment method includes receiving, at a ground control station (GCS), assignment of a first communication channel set from a spectrum authority before takeoff of the unmanned aircraft; receiving, at the GCS, assignment of a second communication channel set when the unmanned aircraft is to move from a first area using the first communication channel set to a second area using the second communication channel set due to a flight plan of the unmanned aircraft after takeoff of the unmanned aircraft; and after the unmanned aircraft enters the second area, maintaining, at the GCS, the first communication channel set when the unmanned aircraft reenters the first area due to the flight plan, and returning, at the GCS, the first communication channel set to the spectrum authority when the unmanned aircraft does not reenter the first area due to the flight plan.

Abstract: Disclosed is a method and apparatus for selecting a channel for UAV control and non-payload communication on the basis of a channel interference analysis. According to an embodiment of the present disclosure, provided is a method of selecting a UAV control channel on the basis of an interference analysis, the method including: performing, by a user device, the interference analysis; selecting, by the user device, a channel on the basis of a result of the interference analysis; requesting, by the user device, a central management device to approve the selected channel; and performing, by the user device, communication with a UAV on the channel approved by the central management device.

Abstract: Disclosed is a method and apparatus for transmitting data of an unmanned aerial vehicle control system. According to an embodiment of the present disclosure, provided is a method of transmitting data of an unmanned aerial vehicle control system, the method including: connecting an unmanned aerial vehicle to a ground radio station via a mission data link and a non-mission data link; checking a maximum transmit power of the non-mission data link; checking a margin value of the non-mission data link considering a state of the unmanned aerial vehicle; checking a required transmit power of the non-mission data link by applying the margin value of the non-mission data link; and determining a transmit power of the non-mission data link by comparing the maximum transmit power with the required transmit power.

Abstract: Disclosed is a channel assignment method of a communication system for controlling an unmanned aerial vehicle (UAV), the method including receiving assignment data and an interference analysis criterion from a spectrum authority; performing an interference analysis and selecting a control and non-payload communication (CNPC) channel based on the assignment data and the interference analysis criterion; and requesting the spectrum authority for assigning the CNPC channel.

Abstract: A ground radio station (GRS) apparatus and a radio station apparatus included in an unmanned aerial vehicle (UAV) are provided. The GRS apparatus may include an antenna configured to transmit and receive a radio frequency (RF) signal, an RF and/or intermediate frequency (IF) (RF/IF) chain configured to perform a conversion between the RF signal and a baseband signal, a baseband transceiving processor configured to transmit and receive the baseband signal, and a BB-IF interface configured to map the baseband signal to the RF/IF chain or the baseband transceiving processor.

Abstract: Disclosed is a method and apparatus for transmitting data of an unmanned aerial vehicle control system. According to an embodiment of the present disclosure, provided is a method of transmitting data of an unmanned aerial vehicle control system, the method including: connecting an unmanned aerial vehicle to a ground radio station via a mission data link and a non-mission data link; checking a maximum transmit power of the non-mission data link; checking a margin value of the non-mission data link considering a state of the unmanned aerial vehicle; checking a required transmit power of the non-mission data link by applying the margin value of the non-mission data link; and determining a transmit power of the non-mission data link by comparing the maximum transmit power with the required transmit power.

Abstract: A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system is provided. The channel access method may include setting an uplink frequency and a downlink frequency to each of a ground station and an airborne radio station, and performing, by the ground station and the airborne radio station, an initial access using the uplink frequency or the downlink frequency.

Abstract: Disclosed is a method and apparatus for selecting a channel for UAV control and non-payload communication on the basis of a channel interference analysis. According to an embodiment of the present disclosure, provided is a method of selecting a UAV control channel on the basis of an interference analysis, the method including: performing, by a user device, the interference analysis; selecting, by the user device, a channel on the basis of a result of the interference analysis; requesting, by the user device, a central management device to approve the selected channel; and performing, by the user device, communication with a UAV on the channel approved by the central management device.

Abstract: A handover method and a control transfer method are provided. A handover method of performing an inter-cell handover between a first ground station and a second ground station may include setting a first channel to the second ground station, measuring, by an airborne radio station, a second channel and reporting a measurement result to the first ground station, sending, by the first ground station, a handover request to at least one of a ground control station (GCS) or a control and non-payload communication (CNPC) network, determining, by the at least one of the GCS or the CNPC network, whether to perform a handover, and transmitting, by the at least one of the GCS or the CNPC network, a handover instruction to the airborne radio station based on a result of the determining.

Abstract: Disclosed are methods for communication channel setting and connection establishment in a new UAS CNPC system which can dynamically allocate a UA controlling a communication frequency resource to efficiently operate multiple UAs to channels in a limited UA control dedicated frequency band in a national airspace and be applied even to a next-generation P2MP type CNPC system, in order to stably operate the UA and extend the demand of the UA. That is, the present invention has been made in an effort to provide a method for setting a UA controlling communication channel between a ground radio station (GRS) and an unmanned aircraft (UA), which is used for supporting dynamic allocation and management of a UA controlling communication channel and a procedure for establishing connection of a UA controlling communication channel among a ground control system (GCS), the ground radio station (GRS), and the unmanned aircraft (UA).

Abstract: A handover method and a control transfer method are provided. A handover method of performing an inter-cell handover between a first ground station and a second ground station may include setting a first channel to the second ground station, measuring, by an airborne radio station, a second channel and reporting a measurement result to the first ground station, sending, by the first ground station, a handover request to at least one of a ground control station (GCS) or a control and non-payload communication (CNPC) network, determining, by the at least one of the GCS or the CNPC network, whether to perform a handover, and transmitting, by the at least one of the GCS or the CNPC network, a handover instruction to the airborne radio station based on a result of the determining.

Abstract: A ground radio station (GRS) apparatus and a radio station apparatus included in an unmanned aerial vehicle (UAV) are provided. The GRS apparatus may include an antenna configured to transmit and receive a radio frequency (RF) signal, an RF and/or intermediate frequency (IF) (RF/IF) chain configured to perform a conversion between the RF signal and a baseband signal, a baseband transceiving processor configured to transmit and receive the baseband signal, and a BB-IF interface configured to map the baseband signal to the RF/IF chain or the baseband transceiving processor.

Abstract: Disclosed is a channel assignment method of a communication system for controlling an unmanned aerial vehicle (UAV), the method including receiving assignment data and an interference analysis criterion from a spectrum authority; performing an interference analysis and selecting a control and non-payload communication (CNPC) channel based on the assignment data and the interference analysis criterion; and requesting the spectrum authority for assigning the CNPC channel.