Electronics and Telecommunications Research Institute

Kwangwoon University Industry-academic Collaboration Foundation

Samsung Electronics Co., Ltd.

Sk Telecom Company, Ltd.

Kt Corporation

Ktfreetel Co., Ltd

Seung-Kwon Baek

Eunkyung Kim

Chanho Yoon

Young Jo Ko

Tae Jin Lee

Jin-Woo Hong

Dae Young Jang

Kyeongok Kang

Jeongil Seo

Young-cheol Park

Hochong Park

Min Soo Kim

Sung Cheol Chang

Jae Sun Cha

Kwang Jae Lim

Yeon-Seung Shin

Won-Ik Kim

Wooram Shin

Yeong-Jin Kim

Jae Joon Park

Soo-Chang Kim

Jae Su Song

Sung-Hyun Moon

Ji-Soo Park

Min Je Kim

Jae-Su Song

Sung-gu Choi

Bong-Ju Lee

Jae Young Ahn

Jong-Chan Lee

Pyeong Jung Song

Yeon Seung Shin

Jin Up Kim

Jin-Up Kim

Sang-Woo Nam

Hyung-sub Kim

Won Ik Kim

Yeon-seung Shin

Sunhee Yang

Yeong-jin Kim

Pyeong-Jung Song

Hoon-Soon Choi

Soon-Gi Park

Ju-Yon Kim

Sung-Gu Choi

Provided is a method for transmitting, by a transmitter, a first data having periodicity through a channel of an unlicensed band: The transmitter adjusts at least one of transmission timing of the first data and clear channel assessment (CCA) timing for the channel to occupy the channel. The transmitter determines whether the channel may be occupied by performing a CCA on the channel at the CCA timing. The transmitter transmits the first data through the channel at the transmission timing of the first data, when it is determined that the channel may be occupied.

Method and apparatus for managing allocation and usage of radio resource, method and apparatus for transmitting data through unlicensed band channel, and method and apparatus for managing access of radio resource

Provided is an encoding apparatus for integrally encoding and decoding a speech signal and a audio signal, and may include: an input signal analyzer to analyze a characteristic of an input signal; a stereo encoder to down mix the input signal to a mono signal when the input signal is a stereo signal, and to extract stereo sound image information; a frequency band expander to expand a frequency band of the input signal; a sampling rate converter to convert a sampling rate; a speech signal encoder to encode the input signal using a speech encoding module when the input signal is a speech characteristics signal; a audio signal encoder to encode the input signal using a audio encoding module when the input signal is a audio characteristic signal; and a bitstream generator to generate a bitstream.

Apparatus for encoding and decoding of integrated speech and audio

Provided are an apparatus and a method for integrally encoding and decoding a speech signal and a audio signal. The encoding apparatus may include: an input signal analyzer to analyze a characteristic of an input signal; a first conversion encoder to convert the input signal to a frequency domain signal, and to encode the input signal when the input signal is a audio characteristic signal; a Linear Predictive Coding (LPC) encoder to perform LPC encoding of the input signal when the input signal is a speech characteristic signal; and a bitstream generator to generate a bitstream using an output.

Apparatus and method for encoding and decoding of integrated speech and audio utilizing a band expander with a spectral band replication (SBR) to output the SBR to either time or transform domain encoding  according to the input signal

Method and apparatus for managing allocation and usage of radio resource, method and apparatus for transmitting data through unlicensed band channel, and method and apparatus for managing access of radio resouce

A method and an apparatus for allocating uplink resources includes transmitting an uplink grant (UL Grant) for an unlicensed component carrier (UCC) to a plurality of terminals, wherein the UL Grant for a first terminal among the plurality of terminals includes a resource allocation information in which a transmission timing of the uplink data of a second terminal among the plurality of terminals is considered.

Method and apparatus for allocating uplink resources

There is provided a method for transmitting, by a transmitter, a signal through an unlicensed band channel. The transmitter transmits an initial signal through the unlicensed band channel to preoccupy the unlicensed band channel when the unlicensed band channel is in an idle status. The transmitter includes a first partial subframe transmitted after the initial signal in a frame burst depending to transmission timing of the initial signal. Further, the transmitter transmits the frame burst through the unlicensed band channel.

Method and apparatus for transmitting adaptive partial subframe in unlicensed frequency band, method and apparatus for identifying a frame structure, and method and apparatus for transmitting signal

A terminal receives allocation of a unique first identifier of the terminal from a base station. The terminal generates first uplink data. The terminal applies interleaving based on the first identifier to the first uplink data to generate second uplink data.

Non-orthogonal based uplink transmission method and apparatus

Apparatus and method for encoding and decoding of integrated speech and audio utilizing a band expander with a spectral band replication (SBR) to output the SBR to either time or transform domain encoding according to the input signal characteristic

An apparatus for receiving a signal through an unlicensed band includes: a processor, a memory, and a radio frequency unit, wherein the processor executes a program stored in the memory to perform: receiving a secondary synchronization signal (SSS) in at least one remaining subframe except a subframe 0 or a subframe 5 of a plurality of subframes included in a discovery signal measurement timing configuration (DMTC), and detecting the SSS by using a subframe number of the subframe 0 or the subframe 5.

Apparatus for transmitting and receiving data through unlicensed band

An apparatus for receiving a signal through an unlicensed band includes: a processor, a memory, and a radio frequency unit, wherein the processor executes a program stored in the memory to perform: receiving a secondary synchronization signal (SSS) in at least one remaining subframe except a subframeor a subframeof a plurality of subframes included in a discovery signal measurement timing configuration (DMTC), and detecting the SSS by using a subframe number of the subframeor the subframe

Disclosed are a base station and a channel access method performing a channel access in a unlicensed band. The channel access method includes: performing channel sensing at least once on a channel of the unlicensed band in a channel sensing period of a frame; and broadcasting a reservation signal for the channel when the channel is empty.

Radio channel access method and apparatus

Growing community of inventors

Daejeon, South Korea

Seung-Kwon Baek