Lg Electronics Inc.

Doo Hyun Seong

Jae Hoon Chung

Jin Soo Choi

Hyung Ho Park

Kyu Jin Park

Eun Jong Lee

Min Seok Oh

Seong Ho Moon

Sung Ho Moon

Minseok Oh

A method of transmitting data using hybrid automatic repeat request (HARQ) is provided. The method includes transmitting an initial data, receiving a retransmission request for the initial data, generating a retransmission data by shifting the phase of the initial data on signal constellation and transmitting the retransmission data. Inter-cell interference or intra-cell interference can be mitigated.

Method of transmitting data to mitigate interference

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 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

Growing community of inventors

Anyang-si, South Korea

Doo Hyun Seong