Lg Electronics Inc.

Seong Ho Moon

Seung Hee Han

Yeong Hyeon Kwon

Min Seok Noh

Jin Sam Kwak

Dong Cheol Kim

Hyun Woo Lee

Jae Hoon Chung

Jin Soo Choi

Sung Ho Cho

Kyu Jin Park

Eun Jong Lee

Hyung Ho Park

Ki Ho Nam

Doo Hyun Seong

Min Seok Oh

Minseok Oh

Disclosed is a method and an apparatus for communication in a TDD (Time Division Duplex) based wireless communication system. The present invention involves setting a first frame comprising a plurality of consecutive downlink subframes and a plurality of consecutive uplink subframes. The start point for the first uplink subframe in the plurality of consecutive uplink subframes, is located at a switching point in a second frame used by another system.

Method and apparatus for communication in a TDD-based wireless communication system

A method for performing a ranging procedure includes transmitting a ranging request message through a randomly selected ranging slot to a base station, the ranging request message comprising a randomly selected ranging code, and receiving a ranging response message including collision information which informs that collision occurs when at least two user equipments transmit the same ranging code to the base station through the same ranging slot. Delay in the ranging can be reduced.

Method for performing ranging procedure

A method for transmitting data in a wireless communication system is provided. The method includes: transmitting first data through a radio resource allocated in a unit of a default transmission time interval (TTI) including at least one sub-frame in a frame including a plurality of sub-frames consisting of a plurality of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting second data through a radio resource allocated in a unit of a modified TTI obtained by changing the number of sub-frames included in the default TTI in the frame.

Method for transmitting data in wireless communication system

A method for performing a cell search procedure by a user equipment in a wireless communication system includes receiving a primary synchronization signal (PSS), and obtaining a correlation value of the PSS to detect a multimedia broadcast multicast service (MBMS) indicator indicating whether a service is a dedicated MBMS. Accordingly, whether the service is the dedicated MBMS is indicated using a primary synchronization signal or a secondary synchronization signal used in an initial cell search process, and whether the service is the dedicated MBMS can be known without additional complexity. Therefore, cell search of a user equipment can be more effectively performed.

Method for performing cell search procedure in wireless communication system

A method of transmitting data in a wireless communication system, includes: transmitting first data via a first frame for a first wireless communication system; transmitting second data via a second frame for a second wireless communication system supporting backward compatibility with respect to the first wireless communication system; and transmitting control information with respect to the first and second frames, wherein the control information includes a frame control header (FCH) which indicates information about the second frame by using a reserved bit region of the first frame.

Method of transmitting data in wireless communication system

A method of performing channel sounding in a frequency division duplex (FDD) system in which an uplink frame and a downlink frame use different frequency bands includes dividing a transmission bandwidth with respect to the uplink frame into a plurality of sounding zones, allocating at least one of the plurality of sounding zones to a user equipment and receiving a sounding signal from the user equipment through the allocated sounding zone. Inter-cell interference can be mitigated and overhead due to transmission of the sounding signal can be reduced.

Method of performing channel sounding in frequency duplex system

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Anyang-si, South Korea

Seong Ho Moon