Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Sk Telecom Company, Ltd.

Kt Corporation

Industry-Academic Cooperation Foundation, Chosun University

Ktfreetel Co., Ltd

Won-Ik Kim

Sung Cheol Chang

Chul Sik Yoon

Sung Kyung Kim

Hyun Jun Lee

Kwang Jae Lim

Seokki Kim

Mi Young Yun

Eunkyung Kim

Sung-Geun Jin

Jee Hwan Ahn

Hyun-jae Kim

Seung-Kwon Baek

Yeon-Seung Shin

Jae Sun Cha

Soojung Jung

Sung-gu Choi

Bong-Ju Lee

Soo-Chang Kim

Yu Ro Lee

Juhee Kim

Taegyun Noh

Ji-Soo Park

Yeong-Jin Kim

Jae-Su Song

Mi-Young Yun

Seokjoo Shin

Namgi Kim

Young-Ho Jung

Hyun-Jae Kim

Jong-Chan Lee

Seok Ki Kim

Jihoon Choi

Seungkwon Cho

Hyung-sub Kim

Yeon-seung Shin

Yeong-jin Kim

Pyeong-Jung Song

Ho-Shin Cho

Sung-Gu Choi

A base station defines a short TTI (transmission time interval) equal to the length of one subslot as the minimum unit of a time resource for data transmission in a subframe including a plurality of subslots, determines the RS type the terminal will use for transmission, among a plurality of RS types, based on the positions of RSs (reference signals) within the short TTI, and sends information on the RS type the terminal will use for transmission to the terminal.

Method and apparatus for receiving data and method for transmitting data in mobile communication system

A terminal executes a random access procedure with a target base station depending on a pre-random access channel (pre-RACH) command in a handover preparation step executed between a source base station currently accessed by the terminal and the target base station when the terminal receives the pre-RACH command from the source base station through layer2 (L2) signaling in the handover preparation step.

Method and apparatus for handover in wireless communication system

A method for managing a terminal operated in an idle state is provided. The method includes entering a femto cell, determining whether a femto base station managing the femto cell has the same paging group as a macro base station managing a macro cell overlapping the femto cell, transmitting a first ranging code triggering a paging enable state to the femto base station if it is determined that the paging group is the same as the determination result, and receiving a paging message from the femto base station.

Terminal, method for managing thereof, base station and method for managing thereof

A signaling method for a terminal that performs direct communication between terminals terminal is disclosed. A transmitting terminal transmits a link establishment request message for establishing a link to a receiving terminal, and the receiving terminal transmits a link establishment response message responding to this message to the transmitting terminal. The link establishment request message includes a field indicating a flow to use if the receiving terminal acquires a token.

Signalling method for direct communication between terminals

In a direct communication between terminals, a terminal transmits a synchronization channel preamble part after transmitting a synchronization channel message part including synchronization information. The terminal receives a dedicated channel including a direct communication packet after transmitting the synchronization channel preamble part. A transition time gap for switching from transmission to reception may be inserted to an end of the synchronization channel preamble part.

Method and apparatus for transmitting synchronization channel, and method and apparatus for receiving synchronization channel

A communication method of a terminal that can operate in a relay mode or a base station mode is provided. When the terminal, having received a service from a first base station, detects that a service connection to the first base station is unavailable, the terminal searches for a second base station, which is an available neighboring base station. The terminal transmits a ranging request message including a base station identifier of the first base station to the second base station.

Terminal and communication method thereof

Referring to FIG., if the direct communication terminal, among the direct communication terminalsandreceiving a downlink multicast service from the base stationthrough the forwarding terminal, wants to be a talker, the direct communication terminalperforms a unicast connection establishment procedure with the forwarding terminal, in order to transmit an uplink unicast packet.

Method of direct communication between terminals respectively connected and unconnected to base station

A method of managing a resource is provided by a base station. The base station allocates a resource to a terminal, and generates a downlink control channel including information of the allocated resource and a transmission time of a next downlink control channel. Further, the base station transmits the downlink control channel to the terminal.

Method and apparatus for managing resource

A method of setting a cycle of a low-duty mode in a femto base station is provided. The cycle of the low-duty mode has a pattern in which an available interval and an unavailable interval repeatedly appear, and the available interval is set to include a paging listening interval of a paging cycle. A method of setting a cycle of a low-duty mode in a femto base station having a service area overlapping with that of a macrocell is provided. An unavailable interval is set by taking the overlapping degree of the service area of the femto base station with the macrocell into consideration. A method of setting a cycle of a low-duty mode in a plurality of femto base stations operated in the low-duty mode is provided. The same cycle can be set for a plurality of base stations.

Method of low-duty mode operation of femtocell base station

A method and apparatus for transmitting a synchronization signal in a talk-around direct communication network is provided. The method includes: determining one of a plurality of second windows included in a first window as a synchronization reception window; selecting one of a plurality of synchronization slots included in the second windows as a first synchronization slot; transmitting a first synchronization signal through the first synchronization slot included in the second windows, excluding the synchronization reception window; detecting a second synchronization signal transmitted from other terminals using the first synchronization slot included in the synchronization reception window; and determining that a collision from amongst the synchronization signals has occurred based on the detection result.

Method and apparatus for transmitting synchronization signal in talk-around direct communication network

A relay, a terminal, and a communication method of the same are provided. The terminal acting as a relay receives a message including scan duration information from a superordinate HR-BS, and the terminal transmits a message including the scan duration information to a subordinate HR-MS. The terminal receives an A-preamble from the superordinate HR-BS according to the scan duration information.

Communication method of relay, terminal, and communication method of the terminal

A permutated channel structure based on a block structure in talk-around direct communication is provided. A dedicated subchannel interferes with only one adjacent dedicated subchannel, even with a large synchronization error, by permutating the dedicated subchannels by cyclic shifts, whereby diversity gain can be maintained and interference between adjacent channels can be minimized.

Method and apparatus for transmitting frames in talk-around direct communication

A terminal identifying method identifies a terminal in a media access control layer, and includes allocating a station ID to the terminal for identifying the terminal, and allocating a flow ID to a connection in the terminal for identifying the connection in the terminal.

Identifying method and protocol data unit generating apparatus

A mobile relay station (RS) and a handover method thereof are provided. When it is determined that a mobile RS performs handover from a superordinate base station (BS) to a target BS, information indicating admission of handover is received from the superordinate BS. The mobile RS transmits a service unavailability section to a subordinate terminal, whereby the subordinate terminal is prevented from performing handover to a different BS or a different RS.

Mobile relay station and handover method thereof

A direct communication method between terminals is provided. When a terminal receives a plurality of synchronization information parts, the terminal selects synchronization information to acquire a reference time among the plurality of synchronization information parts according to a priority. Here, the priority is an order of first synchronization information that is received from a base station, second synchronization information that is received from a global positioning system (GPS), and third synchronization information that is received from a terminal in which a hop count from the base station or the GPS is small.

Method and terminal for direct communication between terminals

Growing community of inventors

Daejeon, South Korea

Won-Ik Kim