Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Namsuk Lee

Sook Jin Lee

Yong Seouk Choi

Jisoo Park

Eunkyung Kim

Kyung Soo Kim

Geon Min Yeo

Kanghee Kim

Sun-Mi Jun

Nak Woon Sung

A terminal receives access priority information on a plurality of sub-beams configuring a beam from a base station, selects one of a plurality of beams, and selects one of a plurality of sub-beams of the selected beam on the basis of the access priority information to perform a random access.

Method and apparatus for initial access in mobile communication system

A method and apparatus for allocating a resource in a heterogeneous network environment are provided. In a heterogeneous network environment in which small cells and a macrocell are mixed, a macro base station divides an entire frequency band that is allocated to a corresponding macrocell into a plurality of Frequency Partitions (FPs). The macro base station allocates some of the plurality of FPs to small cells that are included in the macrocell.

Method and apparatus for allocating resource in heterogeneous network

An apparatus for reporting location information reports location information to a base station when there is a reporting request for location information necessary for wireless location measurement from the base station and reports the location information necessary for the wireless location measurement to the base station according to a reporting period. In addition, the apparatus for reporting location information reports the location information to the base station when events are generated within the reporting period.

Apparatus and method for reporting location information of terminal

A base station resets a wireless signal processing time depending on the processing capability of a terminal, and determines the transmission position of a feedback signal for a data packet using the reset wireless signal processing time and transmits the same to the terminal. If the feedback signal indicates the success of reception of the data packet, the data packet can be processed using the reset wireless signal processing time, and the wireless signal processing time can be reset to a smaller value.

Method for acquiring processing time of wireless signal

Provided is a method for retransmission in a terminal and a base station, the method including: receiving a data burst transmitted by occupying at least one subframe from the other one of the terminal and the base station; determining a transmission timing for transmitting a feedback signal based on a value, determined by transmission information of the data burst including the number of subframes occupied by the data burst, and a frame offset; transmitting the feedback signal to the other one of the terminal and the base station at the transmission timing; and if an NACK message is included in the feedback signal, receiving the data burst retransmitted from the other one of the terminal and the base station.

Method and apparatus for retransmission

The present invention relates to a resource allocation method of a base station. The method includes generating a packet data unit that includes a first field and a downlink control message, wherein the first field indicates whether unsolicited resource is to be allocated for an uplink control message, transmitting the generated packet data unit to the terminal, allocating resources for the uplink control message, and transmitting the allocated resources to the terminal.

Resource allocation method for control message in wireless communication system

Disclosed are a base station and a mobile station which communicate with each other using a frame comprising one or more downlink subframes and one or more uplink subframes. The base station transmits a data burst in a subframe corresponding to a downlink subframe index of a frame corresponding to a first frame index. The mobile station transmits a feedback for the data burst in a subframe corresponding to an uplink subframe index of a frame corresponding to a second frame index. The second frame index and the uplink subframe index are determined by a parameter value. The parameter value is determined by a difference between radio signal processing time and the number of the one or more uplink subframes.

Communication method

During a listening window after a sleep window, a terminal receives a control signal that indicates existence of data corresponding to the terminal, and enters a sleep window if no data corresponding to the terminal exists.

Method to control sleep mode, and terminal and apparatus thereof

A base station adds a paging message indicator representing a position of a frame to receive a paging advertisement message and a paging subgroup indicator representing a paging subgroup to which the paging advertisement message is to be transmitted to a PGID-INFO message and transmits the PGID-INFO message to a terminal, and the terminal determines whether a paging advertising message is to be transmitted using a paging message indicator and a paging subgroup indicator of the PGID-INFO message and a position of a frame to receive a paging advertisement message.

Apparatus and method for paging in wireless communication system

A method of performing a handover procedure of a handover performing apparatus in a wireless communication system in which a macro base station and a femto base station coexist is provided. The method of performing the handover procedure of the handover performing apparatus includes detecting an uplink signal transmitted from a terminal to the macro base station, sending a report message including information about the uplink signal to the macro base station, and performing the handover procedure with the terminal when the macro base station triggers handover based on the report message.

Method and apparatus of performing handover in wireless communication system

Provided is a method in which a terminal conducts an operation for retransmission using a frame divided into downlink subframes and uplink subframes, the method including: receiving a data burst transmitted from a base station; determining a feedback frame offset based on the relationship between a range determined based on division information of the frame and a downlink subframe index in which the data burst has been transmitted; determining indices of a frame and uplink subframe for transmitting a feedback signal based on the frame offset; transmitting the feedback signal to the base station in the determined indices of the frame and uplink subframe; and if an NACK message is included in the feedback signal, receiving the data burst retransmitted from the base station.

Provided is a paging method in a broadband wireless communication system. In order to provide a paging service to a terminal in a wireless communication system in which a macrocell base station and a femtocell base station coexist, the femtocell base station receives a deregistration request message from the terminal, and checks whether the femtocell base station can provide a paging service to the terminal. When failing to provide a paging service to the terminal, the femtocell base station receives paging service information from a paging controller, includes paging service information in a deregistration confirmation message, and transmits it to the terminal, and the macrocell base station provides a paging service to the terminal.

Growing community of inventors

Daejeon, South Korea

Namsuk Lee