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