Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Industry-Academic Cooperation Foundation, Chosun University

Jae Sun Cha

Eunkyung Kim

Chul Sik Yoon

Kwang Jae Lim

Soojung Jung

Sung Cheol Chang

Hyun Jun Lee

Juhee Kim

Seung-Kwon Baek

Hyun Jae Lee

Chanho Yoon

Jae Joon Park

Sung Kyung Kim

Won-Ik Kim

Wooram Shin

Anseok Lee

Seokki Kim

Young Jo Ko

Tae Joon Park

Hyun Kyu Chung

Hyun Sup Lee

Hyun-Jae Kim

Mi Young Yun

DongSeung Kwon

Hyun-jae Kim

Pyeong Jung Song

Jung Hoon Oh

Eun Hee Kim

Ja Beom Gu

Kye Seon Lee

Seokjoo Shin

Namgi Kim

Disclosed herein is a method and apparatus for synchronizing timeslots in a wireless LAN system. The timeslot synchronization method includes: setting, by a first node, a timeslot synchronization reference based on a time synchronization function (TSF) value, followed by transmitting information about a reference of synchronization to a second node; and setting, by the second node, a timeslot synchronization reference based on a TSF value corresponding to the reference of synchronization based on the information transmitted from the first node.

Method and apparatus for synchronizing timeslot in wireless local area network system

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

An operation method of an access point (AP) and a terminal, in a wireless time sensitive network (WTSN), may comprise: receiving, by an AP, an uplink frame from a first terminal; generating compensation indication information for compensation to be performed in the first terminal according to channel information between the first terminal and the AP estimated based on the uplink frame; transmitting the compensation indication information to the first terminal through a downlink frame; and performing, by the first terminal, the compensation based on the compensation indication message transmitted through the downlink frame.

Frame structure and terminal synchronization method and apparatus in wireless communication system

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

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

A method in which a terminal that supports a multi-carrier manages a primary carrier, including: receiving a primary carrier change command from a base station; and changing the primary carrier from a serving primary carrier to a target primary carrier.

Device, method for managing carrier of base station, terminal and method for managing carrier thereof

A method and apparatus of receiving system information of an SeNB, including configuring connection to an MeNB and receiving a RRC Connection Reconfiguration message including the system information of a cell included in a SCG controlled by the SeNB, and a method of sharing frame offset between a MCG controlled by an MeNB and an SCG controlled by an SeNB connected to the MeNB through non-ideal backhaul, including measuring system frame number (SFN) and subframe number (SN) of a cell included in the SCG and sharing the frame offset, which is determined based on the SFN and the SN, with the MeNB or the SeNB are provided.

Method and apparatus for transmitting and receiving system information in mobile communication system

A communication method for a third device that controls a first link established directly between a first device and a second device is provided. The third device allocates a first link identifier for identifying the first link. The third device transmits first information including the first link identifier to the first device and the second device. The third device receives, from the first device and the second device, second information including allocation acceptance information indicating the acceptance or rejection of allocation of the first link identifier.

Methods for uniquely identifying communication links between communication devices

A communication method of a terminal and a communication method of a base station for a direct communication link between terminals are disclosed. A base station schedules a reference terminal to transmit a ranging code, and schedules target terminals to receive the ranging code. The reference terminal measures the ranging code received from the target terminals, and transmits a ranging code measurement result to the base station. The base station selects a terminal from among the target terminals to form the direct communication link with the reference terminal among the target terminals based on the ranging code measurement result.

Communication method of terminal and communication method of base station for direct communication link between terminals

A method for a first terminal communicating with a base station to perform direct communication with a second terminal is provided. The first terminal determines first timing for transmitting or receiving a first signal to or from the base station. Next, the first terminal determines second timing for transmitting a second signal for terminal discovery to the second terminal. When the first timing and the second timing overlap, the first terminal then changes either the first timing or the second timing.

Method of direct communication by terminal

A data relay method includes receiving a relay request from a BS, and when the relay request is accepted, relaying data between the BS and at least one external terminal, or the data relay method includes determining relaying between a first terminal among a plurality of terminals, and other remaining terminals excluding the first terminal among the plurality of terminals, and relaying data between the first terminal and the other remaining terminals.

Method of relay between devices

When zone allocation information of sub-bands is changed, a terminal receives a new MBS configuration message after a lifetime of an MBS configuration message at a time when the changed zone allocation information is received is expired. The terminal applies the changed zone allocation information at the beginning of the first MSI of the new MBS configuration message.

Method and apparatus for managing multicast and broadcast service resource

Provided are a method for transmitting uplink data by a terminal in a mobile communication system, the method comprising: when data to be transmitted to uplink is generated in an idle mode, transmitting a ranging request message including at least one of a group identifier allocated to each terminal group to which the terminal belongs, an offline transmission indicator indicating transmission of uplink data in a state in which the terminal is not connected to a network, and uplink data, to a base station; and receiving a ranging response message confirming that the uplink data has been successfully transmitted, from the base station.

Growing community of inventors

Daejeon, South Korea

Jae Sun Cha