Electronics and Telecommunications Research Institute

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Chanho Yoon

Seung-Kwon Baek

Eunkyung Kim

Young Jo Ko

Sok-Kyu Lee

Sung Cheol Chang

Jae Sun Cha

Wooram Shin

Kwang Jae Lim

Eun-Young Choi

Il-Gu Lee

Sung Kyung Kim

Soojung Jung

Minho Cheong

Hyung Jin Kim

Seungkwon Cho

Jung-Bo Son

Hun-Sik Kang

Jae Joon Park

Thomas Haustein

Lars Thiele

Young-Jo Ko

Yu-Ro Lee

Jong-Ee Oh

DongSeung Kwon

Sung-Hyun Moon

Johannes Dommel

Sameh Eldessoki

SeungKwon Baek

Pyeong Jung Song

Je-Hun Lee

Kwhang-Hyun Ryu

Byung-Chan Kim

Cheol-Hui Ryu

Cheol-Jung Kim

Tae-Hyun Jeon

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

A wireless communication system includes a first transmitter and a second transmitter. For a transmission or reception of data of a first user equipment and data of a second user equipment on resources shared by the first user equipment and the second user equipment, the first transmitter is configured for a superimposed non-orthogonal multiple access, NOMA, transmission or reception of a first data signal of the first user equipment and a second data signal of the second user equipment, and the second transmitter is configured for a superimposed non-orthogonal multiple access, NOMA, transmission or reception of a third data signal of the first user equipment and a fourth data signal of the second user equipment.

Joint transmissions of data in a wireless communication system using a non-orthogonal multiple access transmission scheme

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

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

A method and an apparatus for transmitting a resource, and a method for the HARQ retransmission using an unlicensed band include an operation of performing clear channel assessment (CCA) for the unlicensed band; and an operation of occupying a channel of the unlicensed band according to the CCA and determining whether or not the resource is transmitted based on a position of a transmission time interval (TTI) within a channel occupancy time (COT) for the channel.

Method and apparatus for transmitting signal using unlicensed band in cellular system

There are provided a method and apparatus for transmitting a discovery reference signal (DRS) through transmitting the DRS to a user equipment through a channel of an unlicensed band, receiving measurement report for measurement performed based on the DRS from the user equipment, and scheduling the cell of the unlicensed band based on the measurement report and providing a service to the user equipment through the cell of the unlicensed band.

Method and apparatus for transmitting and receiving reference signal using unlicensed band

Disclosed herein is a method for transmitting, by a terminal, an uplink signal using a first cell type representing a cell using a licensed band frequency and a second cell type representing a cell using an unlicensed band frequency. The terminal configures at least one first radio bearer (RB) being able to use a radio resource for the first cell type and a radio resource for the second cell type for an uplink transmission. The terminal configures at least one second RB being able to use a radio resource for the first cell type for an uplink transmission. The terminal includes at least one first logical channel corresponding to the at least one first RB in a first logical channel group, and the terminal includes at least one second logical channel corresponding to the at least one second RB in a second logical channel group.

Method and apparatus for transmitting uplink signal in mobile communication system of unlicensed band

Growing community of inventors

Daejeon, South Korea

Chanho Yoon