TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM

• US 20140023121A1
• Filed: 09/18/2013
• Published: 01/23/2014
• Est. Priority Date: 06/13/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Jung Hoon, KIM, Ki Jun, ROH, Dong Wook, LEE, Daewon, AHN, Joon Kui
• Granted Patent: US 8,787,421 B2
• Time in Patent Office: Days
• US Class Current: 375/147
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/709718 Determine interference
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0678 using different spreading codes between antennas code allocation H04J13/16
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04L 1/0606 Space-frequency coding
• CPC Class Codes: H04L 1/0643 block codes
• CPC Class Codes: H04L 1/1621 Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.

Claims

1. A method for communicating Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising:

transmitting, by a base station, a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol, wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1;

receiving, by a terminal, the first signal including the first spread ACK/NACK information and the second spread ACK/NACK information on the first set of four available neighboring subcarriers;

transmitting, by the base station, a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol, wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2; and

receiving, by the terminal, the second signal including the third spread ACK/NACK information and the fourth spread ACK/NACK information on the second set of four available neighboring subcarriers,

2. The method of claim 1, further comprising:

de-spreading, by the terminal, either the first and third spread ACK/NACK information or the second and fourth ACK/NACK information for identifying ACK/NACK information allocated to the terminal.

3. The method of claim 1, further comprising:

processing, by the terminal, the first signal based on a coding scheme of the first spread ACK/NACK information and the second spread ACK/NACK information; and

processing, by the terminal, the second signal based on a coding scheme of the third spread ACK/NACK information and the fourth spread ACK/NACK information.

4. The method of claim 1, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are on different OFDM symbols.

5. The method of claim 1, further comprising:

transmitting, by the base station, a third signal including fifth spread ACK/NACK information and sixth spread ACK/NACK information on a third set of four available neighboring subcarriers in an OFDM symbol, wherein the fifth spread ACK/NACK information and the sixth spread ACK/NACK information are coded on the third set of four available neighboring subcarriers as shown in Table 3; and

receiving, by the terminal, the third signal including the fifth spread ACK/NACK information and the sixth spread ACK/NACK information on the third set of four available neighboring subcarriers;

6. A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising:

receiving, by a terminal, a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol; and

receiving, by the terminal, a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol,

wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1,

wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2;

7. The method of claim 6, further comprising:

de-spreading, by the terminal, either the first and third spread ACK/NACK information or the second and fourth ACK/NACK information for identifying ACK/NACK information allocated to the terminal.

8. The method of claim 6, further comprising:

processing, by the terminal, the first signal based on a coding scheme of the first spread ACK/NACK information and the second spread ACK/NACK information; and

processing, by the terminal, the second signal based on a coding scheme of the third spread ACK/NACK information and the fourth spread ACK/NACK information.

9. The method of claim 6, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are on different OFDM symbols.

10. The method of claim 6, further comprising:

receiving, by the terminal, a third signal including fifth spread ACK/NACK information and sixth spread ACK/NACK information on a third set of four available neighboring subcarriers in an OFDM symbol,

wherein the fifth spread ACK/NACK information and the sixth spread ACK/NACK information are coded on the third set of four available neighboring subcarriers as shown in Table 3;

11. A mobile communication system including a base station and a terminal, wherein:

the base station is configured to transmit a first signal including first spread Acknowledgement/Negative acknowledgement (ACK/NACK) information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol, wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1;

the terminal is configured to receive the first signal including the first spread ACK/NACK information and the second spread ACK/NACK information on the first set of four available neighboring subcarriers;

the base station is further configured to transmit a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol, wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2; and

the terminal is further configured to receive the second signal including the third spread ACK/NACK information and the fourth spread ACK/NACK information on the second set of four available neighboring subcarriers,

12. The mobile communication system of claim 11, wherein the terminal is further configured to de-spread either the first and third spread ACK/NACK information or the second and fourth ACK/NACK information for identifying ACK/NACK information allocated to the terminal.

13. The mobile communication system of claim 11, wherein the terminal is further configured to:

process the first signal based on a coding scheme of the first spread ACK/NACK information and the second spread ACK/NACK information; and

process the second signal based on a coding scheme of the third spread ACK/NACK information and the fourth spread ACK/NACK information.

14. The mobile communication system of claim 11, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are on different OFDM symbols.

15. The mobile communication system of claim 11, wherein:

the base station is further configured to transmit a third signal including fifth spread ACK/NACK information and sixth spread ACK/NACK information on a third set of four available neighboring subcarriers in an OFDM symbol, wherein the fifth spread ACK/NACK information and the sixth spread ACK/NACK information are coded on the third set of four available neighboring subcarriers as shown in Table 3; and

the terminal is further configured to receive the third signal including the fifth spread ACK/NACK information and the sixth spread ACK/NACK information on the third set of four available neighboring subcarriers;

16. A terminal for use in a mobile communication system, wherein the terminal is configured to:

receive a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol; and

receive a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol,

wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1,

wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2;

17. The terminal of claim 16, wherein the terminal is further configured to de-spread either the first and third spread ACK/NACK information or the second and fourth ACK/NACK information for identifying ACK/NACK information allocated to the terminal.

18. The terminal of claim 16, wherein the terminal is further configured to:

process the first signal based on a coding scheme of the first spread ACK/NACK information and the second spread ACK/NACK information; and

process the second signal based on a coding scheme of the third spread ACK/NACK information and the fourth spread ACK/NACK information.

19. The terminal of claim 16, wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers are on different OFDM symbols.

20. The terminal of claim 16, wherein the terminal is further configured to receive a third signal including fifth spread ACK/NACK information and sixth spread ACK/NACK information on a third set of four available neighboring subcarriers in an OFDM symbol,

wherein the fifth spread ACK/NACK information and the sixth spread ACK/NACK information are coded on the third set of four available neighboring subcarriers as shown in Table 3: