Method, apparatus, and system for transmitting and receiving information of an uncoded channel in an orthogonal frequency division multiplexing system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-005/00
H04J-013/00
H04L-001/00
출원번호
US-0708956
(2017-09-19)
등록번호
US-10103862
(2018-10-16)
우선권정보
KR-10-2005-0037777 (2005-05-04)
발명자
/ 주소
Kwon, Hwan-Joon
Lee, Ju-Ho
Cho, Joon-Young
Han, Jin-Kyu
Kim, Dong-Hee
Cho, Yun-Ok
출원인 / 주소
Samsung Electronics Co., Ltd.
대리인 / 주소
Jefferson IP Law, LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a com
A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a common control channel and a control channel designated for a particular user. Uncoded 1-bit information is broadly dispersed in frequency and time domains using multiplexing technology for maximizing diversity gain in a channel for transmitting information of at least one bit to a particular user like an acknowledgement (ACK) channel. The transmitter converts a sequence obtained by multiplexing multiple bits to be transmitted to a plurality of users to parallel signals, and broadly disperses the parallel signals in the time and frequency domains. When the uncoded 1-bit information is transmitted, reception reliability is improved because channel coding and transmission are efficiently performed using a small amount of resources.
대표청구항▼
1. A method for transmitting control information by a base station in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: spreading, by the base station, acknowledgement (ACK) information by applying a code from a set of codes;mapping, by the base station, the spread
1. A method for transmitting control information by a base station in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: spreading, by the base station, acknowledgement (ACK) information by applying a code from a set of codes;mapping, by the base station, the spread ACK information to subcarriers in a pattern for increasing diversity gain of the spread ACK information;encoding, by the base station, other control information based on a channel encoding scheme without spreading;multiplexing, by the base station, the spread ACK information mapped to the subcarriers and the encoded other control information; andtransmitting the multiplexed information to at least one terminal. 2. The method of claim 1, wherein the spread ACK information is mapped based on an ACK channel index. 3. The method of claim 1, wherein the spread ACK information is mapped to a plurality of OFDM symbols. 4. The method of claim 1, wherein the ACK information is spread using a spreading factor. 5. The method of claim 1, further comprising: allocating an ACK channel corresponding to the ACK information based on a spreading factor or a fast fourier transform (FFT) size. 6. The method of claim 5, wherein the ACK channel is allocated when a number of terminals within a region of the base station exceeds the spreading factor or the FFT size. 7. The method of claim 1, wherein the mapping of the subcarriers comprises mapping the subcarriers in a particular subband. 8. A base station for transmitting control information in an orthogonal frequency division multiplexing (OFDM) system, the base station comprising: a controller configured to: spread acknowledgement (ACK) information by applying a code from a set of codes,map the spread ACK information to subcarriers in a pattern for increasing diversity gain of the spread ACK information,encode other control information based on a channel encoding scheme without spreading, andmultiplex the spread ACK information mapped to the subcarriers and the encoded other control information; anda transceiver coupled with the controller and configured to transmit the multiplexed information to at least one terminal. 9. The base station of claim 8, wherein the spread ACK information is mapped based on an ACK channel index. 10. The base station of claim 8, wherein the spread ACK information is mapped to a plurality of OFDM symbols. 11. The base station of claim 8, wherein the ACK information is spread using a spreading factor. 12. The base station of claim 8, wherein the controller is further configured to allocate an ACK channel corresponding to the ACK information based on a spreading factor or a fast fourier transform (FFT) size. 13. The base station of claim 12, wherein the ACK channel is allocated when a number of terminals within a region of the base station exceeds the spreading factor or the FFT size. 14. The base station of claim 8, wherein the mapping of the subcarriers comprises mapping the subcarriers in a particular subband. 15. A method for receiving control information by a terminal in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: receiving, by the terminal, information from a base station;demultiplexing, by the terminal, the received information to output spread acknowledgement (ACK) information and other control information, the spread ACK information being mapped on subcarriers in a pattern for increasing diversity gain of the spread ACK information;despreading, by the terminal, the spread ACK information by applying a code from a set of codes; anddecoding, by the terminal, the other control information based on a channel encoding scheme without despreading. 16. The method of claim 15, wherein the spread ACK information is mapped based on an ACK channel index. 17. The method of claim 15, wherein the spread ACK information is mapped to a plurality of OFDM symbols. 18. The method of claim 15, wherein the spread ACK information is spread using a spreading factor. 19. The method of claim 15, further comprising: receiving information through an ACK channel corresponding to the ACK information allocated based on a spreading factor or a fast fourier transform (FFT) size. 20. The method of claim 19, wherein the ACK channel is allocated when a number of terminals within a region of a base station exceeds the spreading factor or the FFT size. 21. The method of claim 15, wherein the spread ACK information is mapped on the subcarriers in a particular subband. 22. A terminal for receiving control information in an orthogonal frequency division multiplexing (OFDM) system, the terminal comprising: a transceiver configured to receive information from a base station; anda controller coupled with the transceiver and configured to: demultiplex the received information to output spread acknowledgement (ACK) information and other control information, the spread ACK information being mapped on subcarriers in a pattern for increasing diversity gain of the spread ACK information,despread the spread ACK information by applying a code from a set of codes, anddecode the other control information based on a channel encoding scheme without despreading. 23. The terminal of claim 22, wherein the spread ACK information is mapped based on an ACK channel index. 24. The terminal of claim 22, wherein the spread ACK information is mapped to a plurality of OFDM symbols. 25. The terminal of claim 22, wherein the spread ACK information is spread using a spreading factor. 26. The terminal of claim 22, wherein the controller is further configured to receive information through an ACK channel corresponding to the ACK information allocated based on a spreading factor or a fast fourier transform (FFT) size. 27. The terminal of claim 26, wherein the ACK channel is allocated when a number of terminals within a region of a base station exceeds the spreading factor or the FFT size. 28. The terminal of claim 22, wherein the spread ACK information is mapped on the subcarriers in a particular subband.
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