Abstract: A random access method in a beam division multiple access (BDMA) system including: receiving, by a terminal, a reference signal of at least one beam sector transmitted from an access point (AP) device; estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in the boundary area of the beam sector by using the strength of the reference signal; transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble.

Abstract: A coordinated transmission method based on beam division multiple access and an apparatus performing the same are disclosed. The coordinated transmission method in a beam division multiple access environment, which divides a service target region into a plurality of beam sectors through a plurality of antenna arrays having at least one of a pattern characteristic and a polarization characteristic, includes receiving a coordination request from a user terminal located in the service target region and performing any one among a macro diversity operation, a coordinated silence operation, and a coordinated beamforming operation for the user terminal based on an interference level included in the coordination request.

Abstract: A massive antenna-based pattern/polarization beam division multiple access method and an apparatus performing the same are provided. The massive antenna-based pattern/polarization beam division multiple access method includes generating a plurality of beam sectors for each antenna array by using a plurality of pattern/polarization antenna arrays and performing MIMO transmission in each of the plurality of beam sectors, wherein the plurality of pattern/polarization antenna arrays each have a different radiation pattern.

Abstract: A random access method in a beam division multiple access (BDMA) system including: receiving, by a terminal, a reference signal of at least one beam sector transmitted from an access point (AP) device; estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in the boundary area of the beam sector by using the strength of the reference signal; transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble.

Abstract: A receiving apparatus based on pattern/polarization beam division multiple access (BDMA) including an antenna configured to receive a reference signal related to at least one of patterns and polarizations of a plurality of antennas included in a transmitting apparatus, and configured to transmit channel information, and a controller configured to select a particular antenna group among a plurality of antenna groups that are grouped from the plurality of antennas included in the transmitting apparatus using the reference signal, and configured to generate the channel information corresponding to the particular antenna group.

Abstract: A massive antenna-based pattern/polarization beam division multiple access method and an apparatus performing the same are provided. The massive antenna-based pattern/polarization beam division multiple access method includes generating a plurality of beam sectors for each antenna array by using a plurality of pattern/polarization antenna arrays and performing MIMO transmission in each of the plurality of beam sectors, wherein the plurality of pattern/polarization antenna arrays each have a different radiation pattern.

Abstract: A coordinated transmission method based on beam division multiple access and an apparatus performing the same are disclosed. The coordinated transmission method in a beam division multiple access environment, which divides a service target region into a plurality of beam sectors through a plurality of antenna arrays having at least one of a pattern characteristic and a polarization characteristic, includes receiving a coordination request from a user terminal located in the service target region and performing any one among a macro diversity operation, a coordinated silence operation, and a coordinated beamforming operation for the user terminal based on an interference level included in the coordination request.

Abstract: Provided is a joint pattern beam sectorization method and apparatuses for performing the same, wherein the joint pattern beam sectorization method including generating, in a service target region, a pattern sector corresponding to an antenna array including antennas having an identical radiation pattern by using the antenna array and generating pattern beam sectors in the pattern sector through a beamforming using the antennas.

Abstract: A receiving apparatus based on pattern/polarization beam division multiple access (BDMA) including an antenna configured to receive a reference signal related to at least one of patterns and polarizations of a plurality of antennas included in a transmitting apparatus, and configured to transmit channel information, and a controller configured to select a particular antenna group among a plurality of antenna groups that are grouped from the plurality of antennas included in the transmitting apparatus using the reference signal, and configured to generate the channel information corresponding to the particular antenna group.

Abstract: Provided is a joint pattern beam sectorization method and apparatuses for performing the same, wherein the joint pattern beam sectorization method including generating, in a service target region, a pattern sector corresponding to an antenna array including antennas having an identical radiation pattern by using the antenna array and generating pattern beam sectors in the pattern sector through a beamforming using the antennas.

Abstract: Exemplary embodiments provide for an apparatus and a method for extended range wireless powering and charging of low-power electrical devices. The apparatus and method may comprise circuits and steps for receiving radio frequency energy; circuits and steps for resonating the radio frequency energy to increase the amplitude of the radio frequency energy; circuits and steps for retransmitting the resonated radio frequency energy; circuits and steps for receiving the retransmitted resonated radio frequency energy; and circuits and steps for converting for converting the retransmitted resonated radio frequency energy into direct current for the extended range wireless powering and charging of low-power electrical devices.

Abstract: Disclosed is a computer that includes: a system body having an input device; a display module having a display surface and a rear surface; a display case having a side wall surface; and a hinge pivotally coupling the body to the display module, the hinge including a hinge frame having first and second surfaces, the first surface coupled with the rear surface of the display module, the second surface coupled with the side wall surface of the display case.

Abstract: Disclosed is a computer that includes: a system body having an input device; a display module having a display surface and a rear surface; a display case having a side wall surface; and a hinge pivotally coupling the body to the display module, the hinge including a hinge frame having first and second surfaces, the first surface coupled with the rear surface of the display module, the second surface coupled with the side wall surface of the display case.

Abstract: Disclosed is a computer that includes: a system body having an input device; a display module having a display surface and a rear surface; a display case having a side wall surface; and a hinge pivotally coupling the body to the display module, the hinge including a hinge frame having first and second surfaces, the first surface coupled with the rear surface of the display module, the second surface coupled with the side wall surface of the display case.

Abstract: Disclosed is a computer that includes: a system body having an input device; a display module having a display surface and a rear surface; a display case having a side wall surface; and a hinge pivotally coupling the body to the display module, the hinge including a hinge frame having first and second surfaces, the first surface coupled with the rear surface of the display module, the second surface coupled with the side wall surface of the display case.