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Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA

OFDMA에서의 패킷 데이터 전송 방법 및 장치
이미지 확대
Inventors
Kim Il Gyu, Young-Hoon Kim, Park Hyeong Geun, Moon-Sik Lee, Shin Eun-Jeong, Chang Kapseok, Bang Seung Chan, Jwa Hye Kyung
Application No.
12094238 (2006.11.17)
Publication No.
20080316913 (2008.12.25)
Registration No.
8369300 (2013.02.05)
Country
UNITED STATES
Project Code
05MM1100, Research on 4G Mobile Communications Technology, Hwang Seung Ku
Abstract
The present invention relates to a packet data transmission method in an OFDMA system and an apparatus thereof. The present invention provides a user packet data transmission method including generating a RACH burst for channel information estimation, selecting a first antenna among a plurality of antennas, transmitting the RACH burst through the first antenna to a base station, receiving a data transmission acceptance signal from the base station, in response to the RACH burst, transmitting user packet data through the first antenna when receiving a signal indicating that the data transmission is allowed, and selecting a second antenna that is difference from the first antenna and transmitting a RACH burst through the second antenna when receiving a signal indicating that the data transmission is not allowed, and a transmitting apparatus of a mobile station having the plurality of antennas. According to the present invention, the RACH burst and user packet data are transmitted by using a mobile station having a plurality of antennas in an LTE-applied OFDMA system, and therefore data transmission can be performed with a wide bandwidth and high data rate and a deep fading period that may occur during the data transmission can be reduced, thereby preventing call dropping and improving data transmission performance.
KSP Keywords
Call Dropping, Data transmission, Deep fading, Mobile station(MS), TRANSMIT DIVERSITY, Wide Bandwidth, base station, data rate, high data rate, packet data, transmission method, transmission performance
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Status Patent Country KIPRIS
Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA
Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA GERMANY
Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA UNITED KINGDOM
Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA ITALY
Registered METHOD AND APPARATUS FOR TRANSMITTING BY USING TRANSMIT DIVERSITY AT DFT SPREAD OFDMA FRANCE