US Pat. No. 9,430,877

ELECTRONIC DEVICE AND METHOD FOR SELECTING AUGMENTED CONTENT USING THE SAME

WILUS INSTITUTE OF STANDA...

1. An electronic device providing augmented reality, comprising:
a memory storing at least one content group, wherein each of the at least one content group includes a plurality of virtual
objects;

a camera;
a display; and
a controller configured to:
capture, via the camera, an image including a real object and a marker,
obtain identification information on the real object based on the image,
obtain angle information reflecting an orientation of the marker with respect to the real object using the image, wherein
the angle information is calculated based on a gradient of a line starting from a point of the real object to the marker,

determine a specific content group from the at least one content group based on the identification information,
select, according to the angle information, a specific virtual object among the virtual objects in the specific content group,
wherein at least two different virtual objects in the specific content group correspond to different angle information, and

augment, via the display, the specific virtual object.

US Pat. No. 9,655,145

WIRELESS COMMUNICATION METHOD FOR ALLOCATING CLEAR CHANNEL, AND WIRELESS COMMUNICATION TERMINAL USING SAME

Wilus Institute Of Standa...

1. A wireless communication method of a terminal, comprising:
receiving a radio signal of a specific channel;
measuring a signal strength of the received radio signal; and
determining whether the specific channel is busy based on the measured signal strength and BSS identifier information of the
radio signal,

wherein the determining is performed based on clear channel assessment (CCA) for the specific channel, and a CCA threshold
used for the CCA is set by the terminal to different levels according to whether the BSS identifier information of the radio
signal is the same as BSS identifier information of the terminal,

wherein when the BSS identifier information of the radio signal is the same as BSS identifier information of the terminal,
a first CCA threshold is used for the CCA, and when the BSS identifier information of the radio signal is different from BSS
identifier information of the terminal, a second CCA threshold having a higher level than the first CCA threshold is used
for the CCA, and

wherein when the BSS identifier information of the radio signal is different from the BSS identifier information of the terminal
and the signal strength of the received radio signal is below the second CCA threshold, the channel is determined to be idle.

US Pat. No. 9,900,908

METHOD, APPARATUS, AND SYSTEM FOR CHANNEL ACCESS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for performing downlink transmission in a specific cell by a base station in a cellular wireless communication
system, the method comprising:
receiving hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for downlink channel transmission(s) of the
specific cell assigned by a control channel transmitted on another cell;

determining a contention window based on HARQ-ACK value(s) of the HARQ-ACK feedback, wherein when a ratio of negative acknowledgement
(NACK) of the HARQ-ACK value(s) is equal to or more than a reference value, the contention window is increased to a next higher
allowed value, and when the ratio of the NACK of the HARQ-ACK value(s) is less than the reference value, the contention window
is reset to a minimum value, and wherein when the HARQ-ACK value(s) includes discontinuous transmission (DTX), the DTX is
ignored for determining the contention window,

generating a random number N (N?0) in the determined contention window; and
performing the downlink transmission in the specific cell after sensing a channel on the specific cell at least for N slots
while the channel on the specific cell is idle.

US Pat. No. 9,622,237

METHOD, APPARATUS, AND SYSTEM FOR CHANNEL ACCESS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for performing downlink transmission in a specific cell by a base station in a cellular wireless communication
system, the method comprising:
receiving a plurality of hybrid automatic repeat request acknowledgement (HARQ-ACK) responses for downlink channel transmission(s)
of the specific cell assigned by a control channel transmitted on the same specific cell;

determining a contention window based on the HARQ-ACK responses;
generating a random number N (N?0) in the determined contention window; and
performing the downlink transmission in the specific cell after sensing a channel on the specific cell at least for N slots
while the channel on the specific cell is idle,

wherein when a ratio of negative acknowledgement (NACK) among the plurality of HARQ-ACK responses is equal to or more than
a reference value, the contention window is increased to a next higher allowed value

wherein when the ratio of the NACK among the plurality of HARQ-ACK responses is less than the reference value, the contention
window is reset to a minimum value, and

wherein when the plurality of HARQ-ACK responses include discontinuous transmission (DTX), the DTX is counted as NACK.

US Pat. No. 9,986,365

AUDIO SIGNAL PROCESSING METHOD AND DEVICE

Wilus Institute Of Standa...

1. A method for generating a filter for an audio signal, comprising:receiving time domain binaural room impulse response (BRIR) filter coefficients for binaural filtering an input audio signal;
obtaining propagation time information of the time domain BRIR filter coefficients, the propagation time information representing a time from an initial sample to direct sound of the BRIR filter coefficients;
QMF-converting time domain BRIR filter coefficients subsequent to the obtained propagation time to generate a plurality of sets of subband filter coefficients;
obtaining filter order information for determining a truncation length of each set of subband filter coefficients by at least partially using characteristic information extracted from the set of subband filter coefficients, the filter order being variably determined in a frequency domain; and
truncating each set of subband filter coefficients based on the obtained filter order information for each subband.

US Pat. No. 9,763,268

WIRELESS COMMUNICATION METHOD FOR SIMULTANEOUS DATA COMMUNICATION, AND WIRELESS COMMUNICATION TERMINAL USING SAME

Wilus Institute Of Standa...

1. A wireless communication method of a terminal, the method comprising:
receiving a wireless signal of a specific channel;
extracting basic service set (BSS) identifier information of the received wireless signal;
extracting length information from the wireless signal wherein the length information represents information relating to a
transmission completion time point of the wireless signal; and

adjusting a data transmission period of the terminal based on the extracted length information, when the BSS identifier information
of the wireless signal is different from BSS identifier information of the terminal.

US Pat. No. 9,872,315

WIRELESS COMMUNICATION METHOD FOR ALLOCATING CLEAR CHANNEL, AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive a radio signal of a channel,
perform clear channel assessment (CCA) for the channel based on a received signal strength of the radio signal in reference
to a first threshold, and

determine whether the channel is busy based on the CCA,
wherein when BSS identifier information of the radio signal is same as BSS identifier information of the terminal and the
received signal strength of the radio signal is at or above the first threshold, the processor determines the channel is busy,
and

wherein when the BSS identifier information of the radio signal is different from the BSS identifier information of the terminal,
the processor determines whether the channel is busy based on both the first threshold and a second threshold, and

wherein the second threshold is set distinctly, by the terminal, from the first threshold.

US Pat. No. 9,584,943

METHOD AND APPARATUS FOR PROCESSING AUDIO SIGNALS

WILUS INSTITUTE OF STANDA...

1. An apparatus for performing binaural rendering for an input audio signal, the apparatus comprising:
a fast convolution unit configured to perform filtering each of a first group of subband signals of the input audio signal;
and

a tap-delay line processing unit configured to perform tap-delay line filtering each of a second group of subband signals
of the input audio signal,

wherein the fast convolution unit performs the filtering by using a plurality of sets of subband filter coefficients corresponding
to the first group of subband signals, respectively, and each set of subband filter coefficients has an independent length
determined according to a corresponding subband.

US Pat. No. 9,489,123

METHOD FOR SENSING TOUCH PRESSURE AND DIGITAL DEVICE USING THE SAME

WILUS INSTITUTE OF STANDA...

1. A method for sensing touch pressure, comprising: obtaining image data sensed by a camera unit of a digital device;
obtaining an ambient illumination value around the digital device, the ambient
illumination value being sensed by an illumination sensor of the digital device; extracting color information for the image
data; determining whether a touch input has been performed on the camera unit; and estimating a touch pressure of the touch
input based on both of the extracted color information and the obtained ambient illumination value, when it is determined
that the touch input has been performed in the determination step,

wherein the estimated touch pressure is proportional to at least one component value in the color information,
wherein the estimating step establishes a sensitivity of the touch pressure corresponding to a variation of the at least one
component value lower, as the obtained ambient illumination value is higher.

US Pat. No. 10,327,262

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A base wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to transmit, by using the transceiver, a first non-data frame which reserves a Transmit Opportunity (TXOP) and identifies a first channel by an index indicating predetermined channel usage pattern for a frequency band range to a first plurality of wireless communication terminals,
receive, by using the transceiver, at least one second non-data frame through the first channel which is indicated by the first non-data frame from at least one of the first plurality of wireless communication terminals,
simultaneously transmit, by using the transceiver, a first plurality of data frames to a second plurality of wireless communication terminals, and
simultaneously receive, by using the transceiver, a second plurality of data frames from a third plurality of wireless communication terminals, through a second plurality of channels which are indicated by a signaling information,
wherein the signaling information is transmitted from the base wireless communication terminal and represents information on channels allocated to each of the second plurality of wireless communication terminals,
wherein the first plurality of data frames and the second plurality of data frames are transmitted in the TXOP.

US Pat. No. 9,860,668

AUDIO SIGNAL PROCESSING METHOD AND DEVICE

Wilus Institute Of Standa...

1. A method for processing an audio signal, the method comprising:
receiving an input audio signal including a multi-channel signal;
receiving filter order information variably determined for each subband of a frequency domain;
receiving block length information for each subband based on a fast Fourier transform length for each subband of filter coefficients
for binaural filtering of the input audio signal;

receiving Variable Order Filtering in Frequency-domain (VOFF) coefficients corresponding to each subband and each channel
of the input audio signal per block of the corresponding subband, a total sum of lengths of the VOFF coefficients corresponding
to the same subband and the same channel being determined based on the filter order information of the corresponding subband;
and

filtering each subband signal of the input audio signal by using the received VOFF coefficients to generate a binaural output
signal.

US Pat. No. 9,848,275

AUDIO SIGNAL PROCESSING METHOD AND DEVICE

Wilus Institute Of Standa...

7. An apparatus for processing an audio signal for performing binaural rendering of an input audio signal including at least
one of a multi-channel signal and a multi-object signal, wherein the apparatus for processing an audio signal is configured
to:
receive type information of a filter set for binaural filtering of the input audio signal, the type of the filter set being
one of a finite impulse response (FIR) filter, a parameterized filter in a frequency domain, and a parameterized filter in
a time domain,

receive filter information for binaural filtering based on the type information, and
perform the binaural filtering for the input audio signal by using the received filter information, and
wherein when the type information indicates the parameterized filter in the frequency domain,
the apparatus for processing an audio signal receives subband filter coefficients having a length determined for each subband
of a frequency domain and filters each subband signal of the input audio signal by using the subband filter coefficients corresponding
thereto.

US Pat. No. 9,578,437

METHOD AND APPARATUS FOR PROCESSING AUDIO SIGNALS

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, the method comprising:
receiving multi-audio signals including multi-channel or multi-object signals, each multi-audio signal including a plurality
of subband signals;

receiving truncated subband filter coefficients for filtering the multi-audio signals, the truncated subband filter coefficients
being at least a portion of subband filter coefficients obtained from binaural room impulse response (BRIR) filter coefficients
for binaural filtering of the multi-audio signals, lengths of the truncated subband filter coefficients being determined based
on filter order information obtained by at least partially using characteristic information extracted from the corresponding
subband filter coefficients, and a length of truncated subband filter coefficients of at least one subband being different
from a length of truncated subband filter coefficients of another subband; and

filtering each subband signal of the multi-audio signals by using truncated subband filter coefficients corresponding to each
subband signal.

US Pat. No. 9,832,589

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL, AND PARAMETERIZATION DEVICE FOR SAME

Wilus Institute Of Standa...

1. A method for generating a filter for an audio signal, comprising:
receiving at least one binaural room impulse response (BRIR) filter coefficients for binaural filtering of an input audio
signal;

converting the BRIR filter coefficients into a plurality of subband filter coefficients;
obtaining average reverberation time information of a corresponding subband by using reverberation time information extracted
from the subband filter coefficients;

obtaining at least one coefficient for curve fitting of the obtained average reverberation time information;
obtaining flag information indicating whether the length of the BRIR filter coefficients in a time domain is more than a predetermined
value;

obtaining filter order information for determining a truncation length of the subband filter coefficients, the filter order
information being obtained by using the average reverberation time information or the at least one coefficient according to
the obtained flag information, and the filter order information of at least one subband being different from filter order
information of another subband; and

truncating the subband filter coefficients by using the obtained filter order information.

US Pat. No. 10,313,966

WIRELESS COMMUNICATION METHOD FOR SAVING POWER AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver configured to transmit and receive a wireless signal; and
a processor configured to process wireless signals transmitted or received through the transceiver,
wherein the processor is configured to, in a power save mode:
receive a trigger frame by transition to awake state, wherein the trigger frame is received at or after a predetermined time, and
transmit an uplink frame in response to the trigger frame,
wherein the uplink frame is transmitted, using orthogonal frequency domain multiple access (OFDMA), with one or more other uplink frames transmitted from one or more other terminals in response to the trigger frame.

US Pat. No. 10,070,241

AUDIO SIGNAL PROCESSING METHOD AND APPARATUS

Wilus Institute Of Standa...

7. An apparatus for processing an audio signal, comprising:a core decoder configured to receive a bitstream of an audio signal and decode the audio signal included in the bitstream; and
a renderer configured to render the decoded audio signal to one or more signal of target channels,
wherein the renderer is further configured to:
receive virtual layout information corresponding to a binaural room impulse response (BRIR) filter set for binaural rendering of the audio signal, the virtual layout information including information on target channels determined based on the BRIR filter set, and
render the decoded audio signal to a signal of the target channel based on the received virtual layout information.

US Pat. No. 9,918,343

WIRELESS COMMUNICATION METHOD FOR SIMULTANEOUS DATA COMMUNICATION, AND WIRELESS COMMUNICATION TERMINAL USING SAME

Wilus Institute Of Standa...

7. A wireless communication method of a terminal, the method comprising:
receiving a wireless signal;
extracting length information from the wireless signal, wherein the length information represents duration of the wireless
signal;

extracting basic service set (BSS) identifier information of the wireless signal;
determining whether the wireless signal is a wireless signal of an overlapping BSS based on the extracted BSS identifier information;
and

setting a transmission opportunity (TXOP) of the terminal based on the extracted length information when the wireless signal
is determined to be a wireless signal of an overlapping BSS.

US Pat. No. 10,321,457

WIRELESS COMMUNICATION METHOD AND TERMINAL FOR MULTI-USER UPLINK TRANSMISSION

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, by using the transceiver, a Medium Access Control (MAC) frame which triggers a simultaneous uplink transmission of a plurality of wireless communication terminals including the wireless communication terminal, from a base wireless communication terminal,
perform a clear channel assessment (CCA) in at least one of channels in response to receiving the MAC frame, and
transmit, to the base wireless communication terminal, a response MAC frame for the MAC frame based on the CCA, when a predetermined time elapses after receiving operation of the MAC frame,
wherein the predetermined time has a value which is applied in the simultaneous uplink transmission of the plurality of wireless communication terminals.

US Pat. No. 10,085,243

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

Wilus Institute Of Standa...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor receives, through the transceiver, a first control frame which reserves a channel for a transmission between a transmission terminal and a first plurality of wireless communication terminals and includes information on each of channels respectively allocated to each of the first plurality of wireless communication terminals, from the transmission terminal,
transmits, by using the transceiver, a second control frame in response to the first control frame through a channel allocated to the wireless communication terminal which is indicated by the information to the transmission terminal when at least one of terminal identifier fields included in the first control frame indicates the wireless communication terminal, wherein a receiver address of the first control frame is a group address which indicates a second plurality of wireless communication terminals including the first plurality of wireless communication terminals, wherein the terminal identifier fields include a plurality of association identifiers, wherein each of the plurality of association identifiers respectively identifies the each of the first plurality of wireless communication terminals, and
receives, through the transceiver, a data frame which is transmitted based on the second control frame, from the transmission terminal,
wherein the first control frame includes a duration field which is used for setting a network allocation vector for the transmission between the transmission terminal and the first plurality of wireless communication terminals.

US Pat. No. 10,057,785

METHOD, DEVICE, AND SYSTEM FOR SIGNAL TRANSMISSION IN UNLICENSED BAND

Wilus Institute Of Standa...

1. A method for performing downlink transmission in a specific cell by a base station in a cellular wireless communication system, the method comprising:when the downlink transmission includes a physical downlink shared channel (PDSCH) and a channel in the specific cell is sensed to be idle for a first predefined interval, performing backoff after the first predefined interval in order to perform the downlink transmission; and
when the downlink transmission includes a Discovery Reference Signal (DRS) and the channel in the specific cell is sensed to be idle for a second predefined interval, performing the downlink transmission immediately after the second predefined interval.

US Pat. No. 9,832,585

AUDIO SIGNAL PROCESSING METHOD AND APPARATUS

Wilus Institute of Standa...

6. An apparatus for processing an audio signal for performing binaural rendering for an input audio signal, the apparatus
comprising:
a parameterization unit configured to generate a filter for the input audio signal; and
a binaural rendering unit configured to receive the input audio signal including a multi-channel signal and filter the input
audio signal by using parameters generated by the parameterization unit,

wherein the binaural rendering unit is further configured to:
receive truncated subband filter coefficients for filtering the input audio signal from the parameterization unit, the truncated
subband filter coefficients being at least some of subband filter coefficients obtained from binaural room impulse response
(BRIR) filter coefficients for binaural filtering of the input audio signal and the length of the truncated subband filter
coefficients being determined based on filter order information obtained by at least partially using reverberation time information
extracted from the corresponding subband filter coefficients,

obtain vector information indicating the BRIR filter coefficients corresponding to each channel of the input audio signal,
and

filter each subband signal of the multi-channel signal by using the truncated subband filter coefficients corresponding to
the relevant channel and subband based on the vector information.

US Pat. No. 10,321,254

AUDIO SIGNAL PROCESSING METHOD AND APPARATUS

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, comprising:receiving an audio signal of a first channel, wherein the first channel is classified into a first channel group, and the audio signal of the first channel includes a plurality of subband signals;
receiving an audio signal of a second channel, wherein the second channel is classified into a second channel group, and the audio signal of the second channel includes a plurality of subband signals;
filtering each subband signal of the first channel by using each set of subband filter coefficients generated from a first set of filter coefficients, wherein the first set of filter coefficients corresponds to a position related to the first channel in a virtual reproduction space;
filtering each subband signal of the second channel by using each set of subband filter coefficients generated from a second set of filter coefficients, wherein the second set of filter coefficients corresponds to a position related to the second channel in the virtual reproduction space; and
generating an output audio signal by mixing the filtered subband signals of the first channel and the filtered subband signals of the second channel;
wherein a length of the set of subband filter coefficients is determined based on a filter order for each subband and for each channel group, and the filter order is variable for each subband and for each channel group.

US Pat. No. 9,961,469

METHOD AND DEVICE FOR AUDIO SIGNAL PROCESSING

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, the method comprising:receiving multi-audio signals including multi-channel or multi-object signals, each of the multi-audio signals including a plurality of subband signals, and the plurality of subband signals being classified into a first subband group having only low-frequency subband signals determined based on a predetermined frequency band and a second subband group having only high-frequency subband signals determined based on the predetermined frequency band;
performing, by a fast convolution unit, fast convolution on each low-frequency subband signal of the first subband group;
receiving, by a tap-delay line processing unit, at least one parameter corresponding to each high-frequency subband signal of the second subband group, the at least one parameter being extracted from binaural room impulse response (BRIR) subband filter coefficients corresponding to each high-frequency subband signal of the second subband group; and
performing, by the tap-delay line processing unit, one-tap-delay line filtering of each high-frequency subband signal of the second subband group by using the received parameter.

US Pat. No. 10,313,077

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL FOR COEXISTENCE WITH LEGACY WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

8. An operation method of a wireless communication terminal that communicates wirelessly, the method comprising:receiving a non-legacy physical layer frame by using the transceiver,
obtaining a legacy signaling field including information decodable by a legacy wireless communication terminal from the non-legacy physical layer frame,
obtaining length information indicating information on a duration of the non-legacy physical layer frame after a legacy signaling field, from the legacy signaling field,
obtaining information other than the information on the duration of the non-legacy physical layer frame through a remaining value obtained by dividing the length information by a data size transmittable by a symbol of a legacy physical layer frame, wherein the data size transmittable by a symbol of the legacy physical layer frame is 3 octets when a data rate of the legacy physical layer frame is 6 Mbps, and
determining the number of symbols of the data of the non-legacy physical layer frame according to a following equation,

where [x] denotes a largest integer less than or equal to x,
L_LENGTH denotes the length information,
m denotes a value obtained by subtracting the remaining value from the data size transmittable by a symbol of the legacy physical layer frame,
bPE_Disambiguity denotes a value of PE Disambiguity field,
THE_PREAMBLE denotes a duration of non-legacy preamble of the non-legacy physical layer frame,
TSYM denotes a duration of a symbol of the data of the non-legacy physical layer frame,
wherein the PE Disambiguity field is set based on the duration of a symbol of the data of the non-legacy physical layer frame and an increment of duration to set a value of the length information based on a duration of a symbol of legacy physical layer frame.

US Pat. No. 10,278,210

WIRELESS COMMUNICATION METHOD FOR SIMULTANEOUS DATA TRANSMISSION, AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication method for an access point (AP) comprising:transmitting a trigger frame indicating simultaneous uplink data transmission of multi-users;
receiving uplink data transmitted by a plurality of terminals in response to the trigger frame; and
transmitting a block acknowledgement for the plurality of terminals having transmitted the uplink data,
wherein the trigger frame allocates at least one of a designated access slot and a random access slot for at least one terminal, and
wherein at least one of information about the number of designated access slot(s) and information about the number of random access slot(s) is indicated through the trigger frame.

US Pat. No. 10,141,785

WIRELESS POWER TRANSMISSION APPARATUS AND WIRELESS POWER TRANSMISSION METHOD

Wilus Institute Of Standa...

1. A wireless power transmitting method of a wireless power transmitting apparatus,wherein a standby state of determining whether at least one wireless power receiving apparatus is positioned within a wireless charge range of the wireless power transmitting apparatus and a power transfer state of transmitting power to the corresponding wireless power receiving apparatus when at least one wireless power receiving apparatus is detected in the standby state are provided, and
the standby state includes a first standby state of periodically transmitting a weak detector signal and a strong detector signal and a second standby state in which at least one of a transmission period of the weak detector signal and a transmission period of the strong detector signal is different from that of the first standby state, the method comprising:
determining any one state of the first standby state and the second standby state of the wireless power transmitting apparatus; and
transmitting the weak detector signal and the strong detector signal based on the determined standby state,
wherein the transmission period of the weak detector signal in the second standby state is longer than the transmission period of the weak detector signal in the first standby state.

US Pat. No. 10,129,685

AUDIO SIGNAL PROCESSING METHOD AND DEVICE

Wilus Institute Of Standa...

1. A method for processing an audio signal, the method comprising:receiving an input audio signal;
obtaining block length information and number of blocks information of filter coefficients for each subband;
receiving filter coefficients for each of a subband index, a binaural filter pair index, a block index in the number of blocks, and a time slot index in each block having a length according to the block length information, wherein a total length of filter coefficients for a same subband index and a same binaural filter pair index is determined based on a filter order of the corresponding subband; and
filtering each subband signal of the input audio signal by using the received filter coefficients corresponding thereto.

US Pat. No. 10,512,108

WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD FOR MULTI-USER UPLINK TRANSMISSION

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a trigger frame that triggers a multi-user uplink transmission,
perform a multi-user uplink transmission in response to the received trigger frame, and
receive, through the transceiver, an ACK for the multi-user uplink transmission,
wherein when the multi-user uplink transmission is performed on a resource unit in which a temporary association identifier (AID) is assigned by the received trigger frame, the processor obtains ACK information for the terminal from the ACK for the multi-user uplink transmission based on the temporary AID,
wherein the AID comprises a first AID set consisting of one or more AIDs for AID assignment of each terminal in a basic service set (BSS) and a second AID set consisting of one or more AIDs not included in the first AID set, and
wherein the temporary AID is an AID in the second AID set.

US Pat. No. 10,305,638

WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD FOR MULTI-USER CONCURRENT TRANSMISSION

WILUS INSTITUTE OF STANDA...

1. A base wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
transmit, through the transceiver, a trigger frame triggering a multi-user uplink transmission of one or more terminals, and
receive, through the transceiver, uplink packet(s) transmitted from one or more terminals in response to the trigger frame,
wherein a predetermined padding is performed before a frame check sequence (FCS) field of the trigger frame, and
wherein a predetermined association ID (AID) field information is inserted to the trigger frame to indicate the predetermined padding.

US Pat. No. 10,204,630

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL AND PARAMETERIZING DEVICE THEREFOR

ELECTRONICS AND TELECOMMU...

1. A method for processing an audio signal, comprising:receiving an input audio signal;
receiving one or more binaural room impulse response (BRIR) filter coefficients in a time domain corresponding to at least one position in a virtual reproduction space;
converting the BRIR filter coefficients into a plurality of sets of subband filter coefficients;
truncating each set of subband filter coefficients based on a filter order obtained by at least partially using characteristic information extracted from each set of subband filter coefficients, wherein a length of a set of truncated subband filter coefficients of at least one subband is different from a length of a set of truncated subband filter coefficients of another subband;
generating FFT filter coefficients by fast Fourier transforming (FFT) each set of truncated subband filter coefficients by a predetermined block size in a corresponding subband, wherein the predetermined block size is determined to be a smaller value between first and second values, the first value being obtained by multiplying a reference filter length of a corresponding set of truncated subband filter coefficients by 2, the second value being a predetermined maximum FFT size; and
performing block-wise fast convolution on each subband signal of the input audio signal by using the FFT filter coefficients corresponding thereto.

US Pat. No. 10,469,969

METHOD AND APPARATUS FOR PROCESSING MULTIMEDIA SIGNALS

WILUS INSTITUTE OF STANDA...

1. A method for processing a multimedia signal, the method comprising:receiving a multimedia signal having a plurality of subbands;
receiving one or more proto-type filter coefficients for filtering the multimedia signal;
converting the proto-type filter coefficients into a set of subband filter coefficients for each subband;
individually truncating the set of subband filter coefficients for each subband based on a filter order obtained by at least partially using energy decay time information determined for each subband from the set of subband filter coefficients, wherein the filter order determines a truncation length of the set of subband filter coefficients, and the filter order is determined to be variable in a frequency domain according to the energy decay time information of each subband; and
filtering the multimedia signal by using the truncated set of subband filter coefficients corresponding to each subband signal.

US Pat. No. 10,256,958

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING SAME

Wilus Institute Of Standa...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a first preamble of a wireless packet,
receive, through the transceiver, a second preamble of the wireless packet according to an identified configuration of the second preamble,
wherein the configuration of the second preamble is identified based at least in part on a detected constellation of a specific symbol of the second preamble,
wherein when the detected constellation of the specific symbol is a first constellation, the second preamble includes a high efficiency signal A field (HE-SIG-A) composed of four symbols, and
wherein when the detected constellation of the specific symbol is a second constellation, the second preamble includes an HE-SIG-A composed of two symbols and a high efficiency signal B field (HE-SIG-B).

US Pat. No. 10,412,593

METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING SIGNALS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method of a user equipment to receive a downlink signal in a cellular communication system, the method comprising:detecting a Channel State Information Reference Signal (CSI-RS) in a time unit #n on an unlicensed band cell;
verifying whether the CSI-RS is used for Discovery RS (DRS) using an initialization value of a CSI-RS sequence of the CSI-RS; and
performing at least one of a Radio Resource Management (RRM) measurement or a Channel State Information (CSI) measurement using the CSI-RS based on whether the CSI-RS is used for the DRS,
wherein when the CSI-RS is used for the DRS, the user equipment performs the RRM measurement using the CSI-RS, and when the CSI-RS is not used for the DRS, the user equipment performs the CSI measurement, wherein the time unit #n is not a subframe #0 or #5, and
wherein when an index of the time unit #n is not used for the initialization value of the CSI-RS sequence, the CSI-RS is used for the DRS, and when the index of the time unit #n is used for the initialization value of the CSI-RS sequence, the CSI-RS is not used for the DRS.

US Pat. No. 10,477,589

WIRELESS COMMUNICATION TERMINAL FOR MULTI-USER UPLINK TRANSMISSION, AND WIRELESS COMMUNICATION METHOD

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a trigger frame transmitted by a base wireless communication terminal, and
perform a multi-user uplink transmission based on the received trigger frame, wherein the trigger frame includes a predetermined field indicating whether an additional trigger frame is present; and
wherein when the trigger frame triggers a random access based multi-user uplink transmission and the terminal participates in the random access based multi-user uplink transmission in response to the trigger frame, the processor is further configured to:
decrement a backoff counter for the random access based multi-user uplink transmission by a maximum of N in response to the trigger frame, wherein the N is the number of resource unit(s) allocated for the random access based multi-user uplink transmission and the resource unit(s) are allocated by the trigger frame, and
perform the random access based multi-user uplink transmission when the backoff counter is decremented to 0.

US Pat. No. 10,560,965

WIRELESS COMMUNICATION METHOD FOR ALLOCATING CLEAR CHANNEL, AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
generate a wireless packet including a first preamble and a second preamble,
sense a channel based on a first threshold before transmitting the generated packet to determine whether the channel is idle, and
transmit, through the transceiver, the generated packet when the channel is determined to be idle,
wherein the first preamble includes L-STF, L-LTF and L-SIG fields, and the second preamble at least includes a repeated L-SIG field,
wherein the repeated L-SIG field has repeated information of the L-SIG field and includes a second subcarrier set for non-legacy terminals in addition to a first subcarrier set for legacy and non-legacy terminals,
wherein when a signal is received on the channel during the sensing the channel and the received signal is determined to be a signal of an overlapping basic service set (OBSS), the processor determines whether the channel is idle based on a second threshold, and
wherein the second threshold is set distinctly, by the terminal, from the first threshold.

US Pat. No. 10,470,209

METHOD, APPARATUS, AND SYSTEM FOR CHANNEL ACCESS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for performing downlink transmission in a specific cell by an apparatus in a cellular wireless communication system, the method comprising:receiving hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for downlink channel transmission(s) of the specific cell, wherein the downlink channel transmission(s) are included in one or more adjacent subframes on the specific cell which are most recently transmitted before the downlink transmission;
determining a contention window based on HARQ-ACK value(s) of HARQ-ACK feedback corresponding to downlink channel transmission(s) in specific subframe(s) among the one or more adjacent subframes, wherein when a ratio of negative acknowledgement (NACK) of the HARQ-ACK value(s) is equal to or more than a reference value, the contention window is increased to a next higher allowed value, and when the ratio of the NACK of the HARQ-ACK value(s) is less than the reference value, the contention window is reset to a minimum value,
generating a random number N (N?0) in the determined contention window; and
performing the downlink transmission in the specific cell after sensing a channel on the specific cell at least for N slots while the channel on the specific cell is idle,
wherein the specific subframe is a first one subframe for which HARQ-ACK feedback is available among the one or more adjacent subframes in response to the first one subframe being a full subframe, and
wherein the specific subframes are first two subframes for which HARQ-ACK feedback is available among the one or more adjacent subframes in response the first one subframe being a partial subframe.

US Pat. No. 10,536,979

WIRELESS COMMUNICATION METHOD USING OFDMA RANDOM ACCESS AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
set an integer selected from a range of 0 to a value equal to or smaller than an OFDMA Contention Window (OCW) as a counter for random access,
receive a trigger frame for triggering random access using one or more resource units (RUs) allocated for the random access from the base wireless communication terminal using the transceiver,
decrement a value of the counter based on the one or more RUs allocated for the random access and a capability of the wireless communication terminal,
randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a trigger based (TB) PPDU according to the capability of the wireless communication terminal among the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and
attempt transmission to the base wireless communication terminal using the selected RU,
wherein the RU is a group of a plurality of subcarriers usable for uplink transmission and downlink transmission.

US Pat. No. 10,484,222

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

7. An operation method of a wireless communication terminal, the operation method comprising:receiving a physical frame for a transmission of data to each of a plurality of wireless communication terminals comprising the wireless communication terminal from a base wireless terminal,
obtaining, from the physical frame, a signaling field which signals information on a resource allocation to the plurality of wireless communication terminals and comprises a first field which represents a different type of information according to a Multi User (MU) transmission method which is used in a sub-frequency band corresponding to the first field, wherein the sub-frequency band corresponding to the first field is one of a plurality of sub-frequency bands which are included in a frequency band through which the physical frame is transmitted, wherein the MU transmission method comprises at least one of Orthogonal Frequency Division Multiple Access (OFDMA) and Multi User-Multi Input Multi Output (MU-MIMO), wherein the first field has the same size regardless of the MU transmission method, wherein the first field represents whether the sub-frequency band corresponding to the first field is not allocated for the transmission of data to any of the plurality of wireless communication terminals, from the physical frame, and
when the OFDMA is used for the transmission of data to the plurality of wireless communication terminals, determining, based on the first field, a sub-frequency band which is allocated to the wireless communication terminal, and
obtaining data corresponding to the wireless communication terminal through the sub-frequency band which is allocated to the wireless communication terminal.

US Pat. No. 10,440,745

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING MULTIPLE CHANNELS

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor performs respective contention procedures in a plurality of channels, senses whether respective channels are idle or not for respective time intervals which are determined by respective back-off counters of the respective contention procedures, and performs transmission, by using the transceiver, in the plurality of channels based on the sensing.

US Pat. No. 10,469,978

AUDIO SIGNAL PROCESSING METHOD AND DEVICE

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, the method comprising:receiving an input audio signal;
receiving a set of filter coefficients for each subband;
determining a scalability factor for performing a binaural rendering of the input audio signal;
obtaining a filter order for each subband based on the scalability factor, wherein the filter order is determined to be variable for each subband;
editing the set of filter coefficients for each subband based on a filter order of the corresponding subband, wherein a length of the edited set of filter coefficients is determined based on the filter order of the corresponding subband; and
filtering each subband signal of the input audio signal by using the edited set of filter coefficients corresponding thereto.

US Pat. No. 10,455,346

METHOD AND DEVICE FOR AUDIO SIGNAL PROCESSING

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, the method comprising:receiving an input audio signal including a plurality of subband signals, wherein the plurality of subband signals include a first subband group containing only low-frequency subband signals determined based on a predetermined frequency band and a second subband group containing only high-frequency subband signals determined based on the predetermined frequency band;
performing a first filtering on each subband signal of the first subband group; and
performing a second filtering on each subband signal of the second subband group, wherein the second filtering is distinct from the first filtering,
wherein the first filtering is performed by using a first parameter set including one or more parameters for a corresponding subband and the second filtering is performed by using a second parameter set including one or more parameters for a corresponding subband,
wherein characteristics of the first parameter set is different from characteristics of the second parameter set,
wherein the second parameter set includes a set of gain and delay for the corresponding subband, and
wherein the second filtering comprises performing one-tap-delay line filtering on each subband signal of the second subband group by using the set of gain and delay for the corresponding subband.

US Pat. No. 10,411,870

SIGNALING METHOD FOR MULTI-USER TRANSMISSION, AND WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
generate a frame including a first signal field and a second signal field, wherein the first signal field includes a bandwidth field indicating total bandwidth information in which the frame is transmitted, and the second signal field includes a resource allocation field indicating arrangement information of resource unit(s) in a frequency band through which the frame is transmitted, and
transmit, by the transceiver, the generated frame,
wherein when the frame is a multi-user frame using multiple input multiple output (MIMO) without applying orthogonal frequency division multiple access (OFDMA), the second signal field does not include the resource allocation field.

US Pat. No. 10,542,561

METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING SIGNALS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for a user equipment to receive a downlink signal in a cellular communication system, the method comprising:monitoring a first common control channel indicating a downlink (DL) interval of subframe (SF) #(n?1) and SF #n;
monitoring a second common control channel indicating a DL interval of SF #n and SF #(n+1); and
performing a DL reception process in the SF #n based on a detection result of the first common control channel and a detection result of the second common control channel,
wherein only a detection process for a first physical channel/signal is allowed in the DL reception process in SF #n when a detection of the first common control channel fails, a detection of the second common control channel is successful, and the DL interval of SF #n indicated by the second common control channel is a part of a total orthogonal frequency division multiplexing (OFDM) symbols of SF #n,
wherein the first physical channel/signal comprises a Discovery Reference Signal (DRS),
wherein the DL interval represents occupied OFDM symbols in a DL subframe.

US Pat. No. 10,470,212

METHOD, APPARATUS, AND SYSTEM FOR CHANNEL ACCESS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for performing downlink transmission in a specific cell by a base station in a cellular wireless communication system, the method comprising:receiving a plurality of hybrid automatic repeat request acknowledgment (HARQ-ACK) responses for downlink transmission(s) in a reference subframe of the specific cell;
setting contention window sizes of a plurality of priority classes for a transmission in the specific cell;
selecting a random number N within a contention window size of a particular priority class among the plurality of priority classes; and
performing, after sensing a channel on which a downlink transmission of the particular priority class is to be performed being idle for at least N slot periods, the downlink transmission of the particular priority class on the channel,
wherein the setting contention window sizes comprises:
increasing contention window size of every priority class of the plurality of priority classes to a next higher allowed value in response to a ratio of negative acknowledgement (NACK) among the plurality of HARQ-ACK responses being equal to or more than a reference value, wherein the increased contention window size of every priority class is maintained, and
setting the contention window size of every priority class of the plurality of priority classes to a minimum value in response to the ratio of the NACK among the plurality of HARQ-ACK responses being less than the reference value.

US Pat. No. 10,433,099

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL, AND PARAMETERIZATION DEVICE FOR SAME

WILUS INSTITUTE OF STANDA...

1. A method for processing an audio signal, comprising:receiving an input audio signal;
receiving binaural room impulse response (BRIR) filter coefficients;
obtaining flag information indicating whether a length of the BRIR filter coefficients is more than a predetermined value in a time domain;
converting the BRIR filter coefficients into a set of subband filter coefficients for each subband;
obtaining average reverberation time information of a subband by using reverberation time information extracted from the set of subband filter coefficients;
obtaining one or more coefficients for curve fitting the average reverberation time information;
obtaining filter order information for determining a truncation length of the set of subband filter coefficients, wherein the filter order information is obtained, based on the flag information, by using the average reverberation time information or by using the one or more coefficients, and the filter order is determined to be variable in a frequency domain;
truncating the set of subband filter coefficients by using the filter order information, wherein an energy compensation is performed to the truncated set of subband filter coefficients based on the flag information; and
filtering each subband signal of the input audio signal by using the truncated set of subband filter coefficients corresponding thereto.

US Pat. No. 10,412,621

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL FOR TRANSMITTING INFORMATION ON BUFFER STATUS

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal wirelessly communicating with a base wireless communication terminal, the wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor receives, by using the transceiver, a wireless signal including a trigger frame from the base wireless communication terminal, and
transmits, by using the transceiver, buffer status information including a queue data size field to the base wireless communication terminal based on the trigger frame, wherein the queue data size field indicates a size of data stored in a transmission buffer using a variable granularity of the size of the data, and
wherein the buffer status information is included in a quality of service (QoS) control field which signals information on a QoS control of a medium access control (MAC) header.

US Pat. No. 10,491,355

WIRELESS COMMUNICATION METHOD USING TRIGGER INFORMATION, AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal communicating wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to;
receive trigger information from a base wireless communication terminal using the transceiver, wherein when the trigger information is a trigger frame, the trigger frame comprises a signaling field, wherein the signaling field indicates that the wireless communication terminal is not allowed to aggregate one or more MPDUs requesting an immediate response to generate an Aggregate-MAC Protocol Data Unit (A-MPDU) in response to the trigger information when a value of the signaling field is a predetermined value, and indicates a maximum number of traffic identifiers (TIDs) that is allowed to be aggregated in the A-MPDU when the value of the signaling field is within a predetermined range,
when the value of the signaling field is the predetermined value, generate the A-MPDU not to include the one or more MPDUs requesting an immediate response, when the value of the signaling field is within the predetermined range, generate the A-MPDU according to the maximum number of TIDs, and
transmit the A-MPDU to the base wireless communication terminal.

US Pat. No. 10,554,370

WIRELESS COMMUNICATION METHOD USING TRIGGER INFORMATION, AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A base wireless communication terminal that wirelessly communicates with a plurality of wireless communication terminal, the base wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to
transmit an Aggregate-MAC Protocol Data Unit (A-MPDU) comprising a trigger MPDU including trigger information and one or more data MPDUs including data to a wireless communication terminal by using the transceiver, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal, and
receive ACK information indicating that the data is received, wherein the ACK information is transmitted from the wireless communication terminal based on the information on the RU,
wherein the A-MPDU is capable of including a plurality of trigger MPDUs including the trigger information.

US Pat. No. 10,433,181

METHOD, DEVICE, AND SYSTEM FOR SIGNAL TRANSMISSION IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for performing downlink transmission in a specific cell by a base station in a cellular wireless communication system, the method comprising:when the downlink transmission includes a physical downlink shared channel (PDSCH) and a channel in which the downlink transmission is performed is sensed to be idle for a first predefined interval, performing backoff procedure after the first predefined interval to perform the downlink transmission; and
when the downlink transmission includes a Discovery Reference Signal (DRS) and does not include the PDSCH, and the channel in which the downlink transmission is performed is sensed to be idle for a second predefined interval, performing the downlink transmission immediately after the second predefined interval.

US Pat. No. 10,506,553

WIRELESS COMMUNICATION METHOD FOR SIMULTANEOUS DATA TRANSMISSION AND RECEPTION AND WIRELESS COMMUNICATION APPARATUS USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication method of a terminal, the method comprising:receiving, from an AP, a trigger frame indicating transmission(s) of at least one terminal in a same basic service set (BSS);
obtaining duration information indicated by the trigger frame;
performing a data transmission in response to the reception of the trigger frame; and
receiving acknowledgement frame corresponding to the data transmission based on the duration information;
wherein, in response to the trigger frame, multiple data transmissions are simultaneously performed by a plurality of terminals in the same BSS when the plurality of terminals are indicated by the trigger frame, and
wherein the receiving the acknowledgement frame comprises, when a duration of the data transmission is shorter than a duration corresponding to the duration information indicated by the trigger frame, receiving the acknowledgement frame at a time determined based on the duration information indicated by the trigger frame.

US Pat. No. 10,575,332

WIRELESS COMMUNICATION METHOD FOR SIMULTANEOUS DATA COMMUNICATION, AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver configured to transmit and receive wireless signals; and
a processor configured to process wireless signals transmitted or received through the transceiver,
wherein the processor is configured to:
receive a first packet through the transceiver,
measure a received signal strength of the first packet,
determine whether the first packet is a packet of a basic service set (BSS) with which the terminal is associated or a packet of a different BSS from the BSS with which the terminal is associated, and
access a channel based on the received signal strength of the first packet when the first packet is determined to be the packet of the different BSS from the BSS with which the terminal is associated.

US Pat. No. 10,588,128

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL, WHICH USE NETWORK ALLOCATION VECTOR

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, from a base wireless communication terminal through the transceiver, a first frame including first information indicating a duration required for a pending frame exchange sequence and second information indicating a frequency band which is allocated for transmission of a second frame, wherein the pending frame exchange sequence is a transmission sequence between one or more wireless communication terminals and the base wireless communication terminal,
set a network allocation vector (NAV) according to the first information indicating the duration for the pending frame exchange sequence, and
reset the NAV when the wireless communication terminal does not receive a PLCP Protocol Data Unit (PPDU) for a reference time from a time point at which the first frame is received,
wherein the reference time is determined based on a Modulation & Coding Scheme (MCS) with which the second frame is transmitted,
wherein the MCS with which the second frame is transmitted is the most robust MCS usable for a transmission of a PPDU including the second frame, and
wherein the second frame is a response to the first frame.

US Pat. No. 10,582,520

WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD FOR TRANSMITTING UPLINK BY MULTIPLE USERS

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
generate an uplink packet, wherein a predetermined field of a MAC header of the uplink packet indicates information on uplink data of the terminal, and
transmit, through the transceiver, the generated uplink packet to a base wireless communication terminal,
wherein the predetermined field of the MAC header individually indicates size information of uplink data corresponding to a first access class set and size information of uplink data corresponding to a second access class set.

US Pat. No. 10,708,890

SIMULTANEOUS DATA TRANSMISSION BETWEEN AN ACCESS POINT AND A PLURALITY OF STATIONS

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a first control frame which reserves a channel for a transmission between an access point and a first plurality of wireless communication terminals, includes terminal identifier fields, and includes information on each of channels respectively allocated to each of the first plurality of wireless communication terminals, from the access point, wherein a receiver address of the first control frame is a group address which indicates a second plurality of wireless communication terminals including the first plurality of wireless communication terminals, wherein the terminal identifier fields include a plurality of association identifiers, wherein each of the plurality of association identifiers respectively identifies the each of the first plurality of wireless communication terminals, and
transmit, by using the transceiver, a second control frame in response to the first control frame to the access point through a channel allocated to the wireless communication terminal which is indicated by the information when the wireless communication terminal determines that the channel allocated to the wireless communication terminal is idle and at least one of the terminal identifier fields indicates the wireless communication terminal,
wherein the first control frame includes a duration field which is used for setting a network allocation vector for the transmission between the access point and the first plurality of wireless communication terminals.

US Pat. No. 10,616,906

METHOD, APPARATUS, AND SYSTEM FOR TRANSMITTING CONTROL CHANNEL IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A base station of a wireless communication system, the base station comprising:a communication module; and
a processor,
wherein the processor is configured to:
transmit a radio frame divided into a plurality of subframes by using the communication module, wherein a duration of each of the plurality of subframes is 1 ms,
transmit a radio resource control (RRC) signaling which indicates that a user equipment is required to set up for receiving a partial subframe having a duration shorter than the duration of each of the plurality of subframes in an unlicensed serving cell, and
when the base station transmits a control channel for scheduling data transmitted on the partial subframe in the unlicensed serving cell, start to transmit the control channel at an Orthogonal Frequency Division Multiplexing (OFDM) symbol position at which half of the duration of each of the plurality of subframes elapses from a boundary of one of the plurality of subframes,
wherein the OFDM symbol position at which half of the duration of each of the plurality of subframes elapses from the boundary of one of the plurality of subframes is one of a plurality of OFDM symbol positions for transmitting a reference signal.

US Pat. No. 10,588,149

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A base wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to transmit, by using the transceiver, a Multiple-Request to Send (M-RTS) frame to a plurality of wireless communication terminals, wherein the M-RTS frame is a medium access control (MAC) frame and includes a plurality of channel vector fields, wherein each of the plurality of channel vector fields indicates information on an allocated sub-frequency band which is allocated to a wireless communication terminal corresponding to each of the plurality of channel vector fields among the plurality of wireless communication terminals, wherein the allocated sub-frequency band is allocated for communication between the base wireless communication terminal and at least one of the plurality of wireless communication terminals after a transmission of the M-RTS frame, and
receive a Clear to Send (CTS) frame which is a response to the M-RTS frame from the at least one of the plurality of wireless communication terminals,
wherein bits of each of the plurality of channel vector fields are divided into a first one or more bits indicating a location of a channel, among a plurality of channels, which includes the allocated sub-frequency band, and a second one or more bits indicating a location and a size of a sub-channel corresponding to the allocated sub-frequency band within the channel, and
wherein the sub-channel is included in the channel.

US Pat. No. 10,581,582

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION DEVICE FOR CONFIGURING BROADBAND LINK

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver configured to transmit and receive a wireless signal; and
a processor configured to control an operation of the wireless communication terminal,
wherein the processor is configured to:
obtain information of a basic primary channel of a basic service set (BSS) with which the terminal is associated, wherein the basic primary channel is set commonly for each terminal in the BSS,
obtain information of an alternative primary channel set for the terminal,
wherein the alternative primary channel is set individually for each terminal in the BSS and the alternative primary channel does not overlap with the basic primary channel, and
perform data transmission and reception selectively using the basic primary channel and the alternative primary channel,
wherein the processor is further configured to:
receive an alternative primary channel indicator through the basic primary channel, and
switch a using channel of the terminal from the basic primary channel to the alternative primary channel in response to the reception of the alternative primary channel indicator.

US Pat. No. 10,757,717

METHOD FOR UPLINK CHANNEL ACCESS TO UNLICENSED BAND IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR

WILUS INSTITUTE OF STANDA...

1. A method for operating a user equipment in a wireless communication system, the method comprising:receiving, from a base station, an uplink grant that schedules an uplink transmission to the base station in at least one subframe through an unlicensed cell;
determining a channel access type for performing the uplink transmission among a first type channel access and a second type channel access according to a predetermined interval determined based on a downlink transmission through the unlicensed cell from the base station, wherein the first type channel access is based on a channel sensing with a random backoff before data transmission, wherein the second type channel access is based on a channel sensing with a single interval before data transmission; and
performing the uplink transmission in the at least one subframe using the determined channel access type,
wherein the uplink transmission is performed using the second type channel access when all of the uplink transmission in the at least one subframe is included in the predetermined interval.

US Pat. No. 10,743,289

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION DEVICE FOR BROADBAND LINK CONFIGURATION

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal for accessing a plurality of contention-based channels, the terminal comprising:a transceiver configured to transmit and receive a radio signal; and
a processor configured to process radio signals transmitted or received through the transceiver,
wherein the processor is configured to:
determine a common backoff counter value to be used by the terminal for accessing multiple channels,
set a first backoff counter for performing a backoff procedure of a first channel based on the common backoff counter value,
set a second backoff counter for performing a backoff procedure of a second channel based on the common backoff counter value, wherein the first backoff counter and the second backoff counter are initially set to be an equal value based on the common backoff counter value,
perform backoff procedures of the first channel and the second channel by using the first backoff counter and the second backoff counter, and
perform multi-channel transmission by using both of the first channel and the second channel when both of the first backoff counter and the second backoff counter have expired.

US Pat. No. 10,660,136

WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD FOR MULTI-USER UPLINK TRANSMISSION

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a trigger frame from a base wireless communication terminal with which the terminal is not associated, wherein the trigger frame triggers a multi-user uplink transmission,
perform an uplink transmission in response to the trigger frame when the trigger frame allocates one or more random access resource units indicated by a temporary association identifier (AID), wherein the uplink transmission is performed through at least one of the random access resource units indicated by the temporary AID, and
receive, through the transceiver, an ACK frame for the uplink transmission,
wherein ACK information for the terminal is identified from the ACK frame based on the temporary AID, and
wherein the temporary AID is an AID not included in a set of AIDs for AID assignment of each terminal in a basic service set (BSS) and has a value different from any AID included in the set of AIDs for AID assignment.

US Pat. No. 10,660,139

WIRELESS COMMUNICATION METHOD USING TXOP AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that wirelessly communicates, the wireless communication terminal comprising:a transceiver for transmitting and receiving a wireless signal; and
a processor for processing the wireless signal,
wherein the processor is configured to:
perform a transmission based on a transmission opportunity (TXOP) limit which is a maximum value of a TXOP, which is a time interval in which a wireless communication terminal has a right to initiate a frame exchange sequence in a wireless medium,
transmit a Null Data Packet Announcement (NDPA) frame informing that a sounding protocol sequence is initiated,
transmit a Null Data Packet (NDP) frame after a predetermined time from when the NDPA is transmitted,
transmit a Beamforming Report Poll (BRP) trigger frame to one or more other wireless communication terminals after the predetermined time from when the NDP frame is transmitted, wherein the BRP trigger frame triggers simultaneous transmission of feedback frames from the one or more other wireless communication terminals, and
when the wireless communication terminal transmits the NDPA frame, the NDP frame, and the BRP trigger frame within the TXOP limit, receive at least one of the feedback frames from the one or more other wireless communication terminals exceeding the TXOP limit, wherein the at least one of the feedback frames is transmitted after the predetermined time from when the BRP trigger frame is received,
wherein each of the feedback frames indicates a state of a channel measured using the NDP frame by a transmitter of the each of the feedback frames and is to be used for a Multi Input Multi Output (MIMO) transmission to the transmitter of the each of the feedback frames or is to be used for a beamforming transmission to the transmitter of the each of the feedback frames.

US Pat. No. 10,580,417

METHOD AND APPARATUS FOR BINAURAL RENDERING AUDIO SIGNAL USING VARIABLE ORDER FILTERING IN FREQUENCY DOMAIN

INDUSTRY-ACADEMIC COOPERA...

1. A method for binaural rendering an audio signal, comprising:receiving an input audio signal;
receiving a set of truncated subband filter coefficients for filtering each subband signal of the input audio signal, the set of truncated subband filter coefficients being at least a portion of a corresponding set of subband filter coefficients obtained from binaural room impulse response (BRIR) filter coefficients for binaural filtering of the input audio signal, a length of the set of truncated subband filter coefficients being individually determined for each subband based on characteristic information extracted from the corresponding set of subband filter coefficients, the length of the set of truncated subband filter coefficients being determined to be variable in a frequency domain, and the set of truncated subband filter coefficients being constituted by one or more FFT filter coefficients generated by performing fast Fourier transform (FFT) by a predetermined block size in a corresponding subband;
generating at least one subframe for each subband by performing fast Fourier transform of each subband signal based on a predetermined subframe size;
generating at least one filtered subframe for each subband, each filtered subframe being generated by multiplying a corresponding subframe and the FFT filter coefficients;
inverse fast Fourier transforming the at least one filtered subframe for each subband; and
generating a filtered subband signal by overlap-adding the at least one inverse fast Fourier transformed subframe for each subband.

US Pat. No. 10,750,540

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A base wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
transmit, by using the transceiver, a first non-data frame, wherein the first non-data frame reserves a Transmit Opportunity (TXOP), identifies a first plurality of wireless communication terminals, and allocates a first channel to each of the first plurality of wireless communication terminals using an index indicating predetermined channel usage pattern for a frequency band range,
receive, by using the transceiver, at least one second non-data frame through the first channel from at least one of the first plurality of wireless communication terminals,
simultaneously transmit, by using the transceiver, a first plurality of data frames to a second plurality of wireless communication terminals, and
simultaneously receive, by using the transceiver, a second plurality of data frames from a third plurality of wireless communication terminals, through a second plurality of channels which are allocated to each of the third plurality of wireless communication terminals,
wherein the first plurality of data frames and the second plurality of data frames are transmitted in the TXOP.

US Pat. No. 10,743,344

CHANNEL ACCESS METHOD, DEVICE AND SYSTEM IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A method for a user equipment to perform uplink transmission on a specific cell in a cellular wireless communication system, the method comprising:receiving uplink scheduling information on the uplink transmission including a new data indicator (NDI) associated with a specific subframe in a first uplink transmission burst;
determining a contention window size based on the NDI;
generating a random number N (N?0) in the determined contention window size; and
performing the uplink transmission on the specific cell after sensing a channel on the specific cell at least for N slots while the channel on the specific cell is idle,
wherein the contention window size is determined independently for each of every channel access priority class,
wherein when the NDI is toggled, the NDI associated with the specific subframe indicates a new data transmission, and each of a contention window size for every channel access priority class is reset to a minimum value for each of every channel access priority class, and
wherein when the NDI is not toggled, the NDI associated with the specific subframe indicates a data retransmission, and each of the contention window size for every channel access priority class is increased to a next higher allowed value for each of every channel access priority class.

US Pat. No. 10,701,732

WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION METHOD FOR CLEAR CHANNEL ALLOCATION

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver configured to transmit and receive a wireless signal; and
a processor configured to control an operation of the terminal,
wherein the processor is configured to:
perform a backoff procedure of a channel for data transmission,
suspend the backoff procedure when a wireless signal having a signal strength higher than a predetermined first threshold is received through the channel,
identify whether the received wireless signal is a wireless signal of the same basic service set (BSS) as a BSS with which the terminal is associated, and
determine whether to resume the backoff procedure based on a second threshold according to the identification result,
wherein when the received wireless signal is identified as not being the wireless signal of the same BSS as the BSS with which the terminal is associated, the processor determines whether to resume the backoff procedure, which is suspended based on the first threshold, using the second threshold, and
wherein the second threshold is set distinctly from the first threshold.

US Pat. No. 10,659,196

WIRELESS COMMUNICATION METHOD SUPPORTING MULTI-USER CASCADING TRANSMISSION AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that wirelessly communicates, the wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to
receive a Downlink Multi-User (DL MU) physical layer protocol data unit (PPDU) including information for an Uplink Multi-User (UL MU) transmission from a base wireless communication terminal by using the transceiver,
set signaling information indicating whether Spatial Reuse (SR) transmission to a PPDU for the UL MU transmission is allowed such that the SR transmission is not allowed when the information for the UL MU transmission is UL MU response information, wherein the UL MU response information includes transmission scheduling information of the PPDU for the UL MU transmission including ACK and is included in a medium access control (MAC) header, wherein the signaling information is included in the PPDU for the UL MU transmission, and
transmit the PPDU for the UL MU transmission to the base wireless communication terminal based on the information for the UL MU transmission.

US Pat. No. 10,651,992

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL FOR COEXISTENCE WITH LEGACY WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that communicates wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to receive a non-legacy physical layer frame by using the transceiver,
obtain a legacy signaling field including information decodable by a legacy wireless communication terminal from the non-legacy physical layer frame,
obtain length information indicating information on a duration of the non-legacy physical layer frame, from the legacy signaling field,
obtain information other than information on the duration of the non-legacy physical layer frame based on a modulation method of a third symbol after the legacy signaling field and a remaining value obtained by dividing the length information by a data size transmittable by a symbol of a legacy physical layer frame, wherein the information other than information on the duration of the non-legacy physical layer frame indicates a format of a non-legacy signaling field included in the non-legacy physical layer frame, and
determine the number of symbols of data of the non-legacy physical layer frame according to a following equation,

where ?x? denotes a largest integer less than or equal to x,
L_LENGTH denotes the length information,
m denotes a value obtained by subtracting the remaining value from the data size transmittable by a symbol of the legacy physical layer frame,
Dsize denotes the data size transmittable by a symbol of the legacy physical layer frame,
bPE_Disambiguity denotes a value of PE Disambiguity field,
THE_PREAMBLE denotes a duration of non-legacy preamble of the non-legacy physical layer frame,
TSYM denotes a duration of a symbol of the data of the non-legacy physical layer frame,
wherein the PE Disambiguity field is set based on the duration of a symbol of the data of the non-legacy physical layer frame and an increment of duration to set a value of the length information based on a duration of a symbol of the legacy physical layer frame.

US Pat. No. 10,623,964

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL FOR SPATIAL REUSE OF OVERLAPPED BASIC SERVICE SET

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising: a processor; and a communication unit, wherein the processor is configured to: receive a trigger frame indicating an uplink multi-user transmission, and transmit a trigger-based PHY protocol data unit (PPDU) in response to the received trigger frame, wherein the trigger-based PPDU comprises a spatial reuse parameter for spatial reuse operation of an overlapping basic service set (OBSS) terminal; wherein a total bandwidth on which transmission of trigger-based PPDU(s) in response to the trigger frame is performed is indicated by a bandwidth field of a high efficiency signal field A (HE-SIG-A) of the trigger based-PPDU, and wherein when the total bandwidth consists of a first frequency band and a second frequency band which are non-contiguous with each other, a spatial reuse parameter for the first frequency band and a spatial reuse parameter for the second frequency band are set to the same value.

US Pat. No. 10,631,335

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING BASIC SERVICE SET IDENTIFICATION INFORMATION DETERMINATION OF RECEIVED FRAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a processor; and
a communication unit,
wherein the processor is configured to:
receive a wireless frame through the communication unit, when the received frame is a very high throughput (VHT) PHY protocol data unit (PPDU), extract information of a partial association ID (AID) and information of a group ID from a preamble of the VHT PPDU,
when the group ID of the VHT PPDU is equal to a predetermined value, check whether at least some information of the partial AID of the VHT PPDU matches a partial basic service set (BSS) color value of a BSS color announced to the terminal, and
determine whether the received frame is an intra-BSS frame or an inter-BSS frame according to whether the at least some information of the partial AID matches the partial BSS color value of the BSS color announced to the terminal.

US Pat. No. 10,616,819

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING MULTI-BASIC SERVICE IDENTIFIER SET

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that communicates wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein a basic service set (BSS) of the wireless communication terminal corresponds to a multiple BSS identifier (BSSID) set,
wherein the multiple BSSID set is a set of a BSSID of each of a plurality of BSSs classified into one group,
wherein the processor is configured to receive a frame through the transceiver, determine the frame as an Intra-BSS frame when a medium access control (MAC) address signaled in a MAC header of the frame matches any one of a plurality of BSSIDs included in the multiple BSSID set, and enter a power save state when the frame is an Intra-BSS frame and a receiver address (RA) of the frame does not indicate the wireless communication terminal.

US Pat. No. 10,701,511

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL, AND PARAMETERIZATION DEVICE FOR SAME

WILUS INSTITUTE OF STANDA...

1. A method for generating a set of filter coefficients for an audio signal, comprising:obtaining a set of subband filter coefficients for each subband, wherein the set of subband filter coefficients is obtained from a set of time domain binaural room impulse response (BRIR) filter coefficients;
obtaining average reverberation time information of each subband by using a reverberation time extracted from the set of subband filter coefficients for a corresponding subband;
obtaining one or more coefficients for curve fitting the average reverberation time information;
obtaining flag information indicating whether a length of the set of time domain BRIR filter coefficients is larger than a predetermined value;
determining a filter order of each subband, wherein the filter order is determined, based at least in part on the flag information, by using the average reverberation time information or by using the coefficients for curve fitting, and wherein the filter order is determined to be variable in a frequency domain; and
truncating the set of subband filter coefficients by using the filter order of a corresponding subband.

US Pat. No. 10,692,508

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL AND PARAMETERIZING DEVICE THEREFOR

ELECTRONICS AND TELECOMMU...

1. A method for post-processing an audio signal by a binaural renderer, comprising:receiving an input audio signal;
receiving one or more binaural room impulse response (BRIR) filter coefficients in a time domain corresponding to at least one position in a virtual reproduction space;
converting the BRIR filter coefficients into a plurality of sets of subband filter coefficients;
truncating each set of subband filter coefficients based on a filter order value for each subband obtained by at least partially using characteristic information extracted from each set of subband filter coefficients, wherein the filter order value is determined to be variable in a frequency domain;
generating fast Fourier transform (FFT) filter coefficients by fast Fourier transforming each set of truncated subband filter coefficients by a predetermined block size in a corresponding subband; and
performing block-wise fast convolution on each subband signal of the input audio signal by using the FFT filter coefficients corresponding thereto,
wherein the predetermined block size is determined to be a smaller value between a first value and a second value,
wherein the first value is obtained by multiplying a reference filter length of a corresponding set of truncated subband filter coefficients by 2, and
wherein the second value is a predetermined maximum FFT size.

US Pat. No. 10,687,281

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL, WHICH USE DISCONTINUOUS CHANNEL

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a processor; and
a communication unit,
wherein the processor is configured to:
receive a wireless packet through the communication unit,
obtain bandwidth information indicated via a bandwidth field of HE-SIG-A of the received packet,
obtain information of an unassigned resource unit via at least one of the bandwidth field of the HE-SIG-A and a subfield of HE-SIG-B of the received packet, and
decode the received packet based on the bandwidth information and the information of the unassigned resource unit,
wherein the information of the unassigned resource unit is indicated via a combination of the bandwidth field of the HE-SIG-A and a resource unit allocation field of the HE-SIG-B, and
wherein the bandwidth field of the HE-SIG-A indicates channel information to be punctured within the bandwidth, and the resource unit allocation field indicates additional puncturing information for the unassigned resource unit within the bandwidth.

US Pat. No. 10,666,405

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING TRAINING SIGNAL

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to, in uplink (UL) orthogonal frequency division multiple access (OFDMA) transmission:
transmit, by using the transceiver, a first one or more fields through a frequency band to a base wireless communication terminal, wherein a preamble of a physical frame includes the first one or more fields to be transmitted through the frequency band and a second one or more fields to be transmitted through a sub-frequency band of the frequency band,
adjust a magnitude of a training signal corresponding to the sub-frequency band based on a value divided by a number of subcarriers of the training signal corresponding to the sub-frequency band, wherein a plurality of training signals configured to be transmitted through an entire frequency band allocated for the UL OFDMA transmission include the training signal corresponding to the sub-frequency band and a training signal corresponding to a sub-frequency band which is not allocated to any wireless communication terminal,
transmit, by using the transceiver, the second one or more fields through the sub-frequency band to the base wireless communication terminal, wherein the second one or more fields include a field including the training signal corresponding to the sub-frequency band and not including the training signal corresponding to the sub-frequency band which is not allocated to any wireless communication terminal, and
transmit data through the sub-frequency band to the base wireless communication terminal,
wherein the sub-frequency band is allocated, by the base wireless communication terminal, to the wireless communication terminal for a transmission of the data,
wherein the training signal corresponding to the sub-frequency band is configured to be used, by the base wireless communication terminal, for automatic gain control for receiving the data from the wireless communication terminal, and
wherein the training signal corresponding to the sub-frequency band which is not allocated to any wireless communication terminal is not transmitted by any wireless communication terminal in the UL OFDMA transmission.

US Pat. No. 10,667,292

WIRELESS COMMUNICATION METHOD FOR SAVING POWER AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive a preamble of a packet through the transceiver, wherein the preamble includes channel allocation field indicating a channel configuration in which data transmission is to be performed and number of users corresponding to the channel configuration, wherein the channel allocation field represents both the channel configuration and the number of users by a particular index value among preset index values and wherein a single index value of at least some of the preset index values indicates two or more different subchannel bandwidths allocated to respective users, and
receive, through the transceiver, data of the packet based on the channel allocation field.

US Pat. No. 10,772,109

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive, by using the transceiver, data from a base communication terminal while the base communication terminal is performing simultaneous transmission to the wireless communication terminal and one or more other wireless communication terminals other than the wireless communication terminal,
when a transmission of data to the wireless communication terminal from the base wireless communication terminal during the simultaneous transmission is terminated, enter a sleep mode for power saving while a transmission of data to the one or more other wireless communication terminals from the base terminal during the simultaneous transmission is going on, wherein a dummy data including repeating specific pattern is transmitted from the base wireless communication terminal after the transmission of the data to the wireless communication terminal is terminated during the simultaneous transmission, and the dummy data is transmitted until the transmission of the data to the one or more other wireless communication terminals is terminated, and
wake up from the sleep mode based an end of the simultaneous transmission.

US Pat. No. 10,764,924

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL IN HIGH DENSITY ENVIRONMENT INCLUDING OVERLAPPED BASIC SERVICE SETS

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that communicates wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive a first PLCP Protocol Data Unit (PPDU) including a trigger frame through the transceiver, wherein the trigger frame triggers an uplink multiuser PPDU transmission of one or more wireless communication terminals in a first Basic Service Set (BSS) which is overlapped with a second BSS including the wireless communication terminal,
receive a physical layer header of a second PPDU which is transmitted in response to the trigger frame,
when predetermined conditions including that a transmission power of a third PPDU is below than a value which is determined based on a received signal strength of the first PPDU are met, transmit the third PPDU while the second PPDU being transmitted, and
when at least one of the predetermined conditions is not met, determine whether a channel through which the third PPDU to be transmitted is idle by using a static Clear Channel Assessment (CCA) threshold value and transmit the third PPDU according to whether the channel is idle while the second PPDU being transmitted,
wherein the static CCA threshold value is used for determining whether a channel is idle when the wireless communication terminal is receiving a PPDU transmitted from the second BSS,
wherein the physical layer header of the second PPDU comprises a spatial reuse field indicating a parameter, wherein the parameter is determined based on a magnitude of interference acceptable by a wireless communication terminal which transmits the first PPDU when receiving the second PPDU, and a transmission power of the first PPDU, and
wherein the predetermined conditions include that the transmission power of the third PPDU is below than a value which is determined based on a received signal strength of the first PPDU and the parameter.

US Pat. No. 10,785,795

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL IN HIGH-DENSITY ENVIRONMENT INCLUDING OVERLAPPED BASIC SERVICE SET

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal that communicates wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to
receive a signaling field of a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) through the transceiver,
obtain an Address field of a MAC header from the PPDU,
determine that the PPDU includes an Inter-Basic Service Set (BSS) frame when information identifying a BSS indicated by the signaling field is the same as information identifying a BSS of a BSS including the wireless communication terminal, and the obtained Address field of the MAC header indicates a BSS which is different from the BSS including the wireless communication terminal as a BSS from which the PPDU is transmitted, and
access a channel based on the determination that the PPDU includes an Inter-BSS frame,
wherein the Address field of the MAC header indicates a MAC address related to a MAC Protocol Data Unit (MPDU).

US Pat. No. 10,785,658

METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING SIGNALS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A user equipment used in a cellular wireless communication system, the user equipment comprising:a wireless communication module; and
a processor,
wherein the processor is configured to:
receive Channel State Information Reference Signal (CSI-RS) configuration information indicating one of plurality of CSI-RS configuration information included in a CSI-RS configuration information set for a downlink cell from a base station, and
receive CSI-RS in the downlink cell according to the CSI-RS configuration information from the base station,
wherein when the downlink cell operates in a licensed band, the CSI-RS configuration information set is a first CSI-RS configuration information set including one or more first CSI-RS configuration information related to Orthogonal Frequency Division Multiplexing (OFDM) symbols #5/#6, one or more second CSI-RS configuration information related to OFDM symbols #9/#10, and one or more third CSI-RS configuration information related to OFDM symbols #12/#13,
wherein when the downlink cell operates in an unlicensed band, the CSI-RS configuration information set is a second CSI-RS configuration information set,
wherein the second CSI-RS configuration information set is part of the first CSI-RS configuration set and does not comprise the one or more third CSI-RS configuration information.

US Pat. No. 10,771,910

AUDIO SIGNAL PROCESSING METHOD AND APPARATUS

WILUS INSTITUTE OF STANDA...

6. An apparatus for processing an audio signal for performing binaural rendering for an input audio signal, the apparatus comprising:a binaural rendering unit configured to:
receive an input audio signal,
receive a set of truncated subband filter coefficients for each subband and each channel, wherein the set of truncated subband filter coefficients is truncated frequency dependently from a set of subband filter coefficients of a binaural room impulse response (BRIR) data set, wherein the length of the set of truncated subband filter coefficients is determined based on a filter order of the corresponding subband, and wherein the filter order is determined to be variable in the frequency domain,
obtain vector information indicating a particular BRIR data set corresponding to a relevant channel of the input audio signal, and
filter each subband signal of the multi-channel signal by using the truncated subband filter coefficients corresponding to the relevant channel and a relevant subband based on the vector information.

US Pat. No. 10,750,403

MULTI-USER WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING SAME

WILUS INSTITUTE OF STANDA...

1. A wireless communication terminal communicating wirelessly, the terminal comprising:a transceiver configured to receive and transmit a wireless signal; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a first trigger frame from a base wireless communication terminal,
transmit, through the transceiver, a first response frame in response to the first trigger frame to the base wireless communication terminal, and
stop enhanced distributed channel access function (EDCAF) corresponding to the first response frame when the wireless communication terminal receives an ACK for the first response frame, wherein the EDCAF is a function for determining a time at which a frame in a queue is transmitted and is defined per access category.

US Pat. No. 10,743,189

METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING SIGNALS IN UNLICENSED BAND

WILUS INSTITUTE OF STANDA...

1. A user equipment used in a cellular wireless communication system, the user equipment comprising:a wireless communication module; and
a processor,
wherein the processor is configured to:
receive Channel State Information Reference Signal (CSI-RS) configuration information indicating one of plurality of CSI-RS configuration information included in a CSI-RS configuration information set for a downlink cell from a base station, and
receive CSI-RS in the downlink cell according to the CSI-RS configuration information from the base station,
wherein when the downlink cell operates in a licensed band, the CSI-RS configuration information set is a first CSI-RS configuration information set including one or more first CSI-RS configuration information related to Orthogonal Frequency Division Multiplexing (OFDM) symbols #5/#6, one or more second CSI-RS configuration information related to OFDM symbols #9/#10, and one or more third CSI-RS configuration information related to OFDM symbols #12/#13,
wherein when the downlink cell operates in an unlicensed band, the CSI-RS configuration information set is a second CSI-RS configuration information set,
wherein the second CSI-RS configuration information set is part of the first CSI-RS configuration set and does not comprise the one or more third CSI-RS configuration information.