Method for transmitting control signal using efficient multiplexing

• US 9,451,613 B2
• Filed: 06/29/2015
• Issued: 09/20/2016
• Est. Priority Date: 10/02/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Choi, Sung Duk, Kim, Ki Jun, Yoon, Suk Hyon, Ahn, Joon Kui, Kim, Bong Hoe, Seo, Dong Youn, Yun, Young Woo, Lee, Jung Hoon, Jeong, Seong Hoon
• Primary Examiner(s): Sciacca, Scott M
• Application Number:
  US14/754,026
• Publication Number:
  US 20150305032A1
• Time in Patent Office: 449 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method of transmitting a control signal using efficient multiplexing is disclosed. The present invention includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-hit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced.

Claims

1. A method for transmitting acknowledgement/non-acknowledgment (ACK/NACK) information, the method performed by a base station and comprising:

multiplexing multiple ACK/NACKs into an ACK/NACK group by using orthogonal codes, wherein the orthogonal codes distinguish the multiple ACK/NACKs within the ACK/NACK group from each other; and

transmitting the ACK/NACK group to a user equipment (UE), through, each of a fixed number of multiple resource sets which are distributed from each other along a frequency axis in a subframe,

wherein each of the multiple resource sets occupies a predetermined number of subcarriers and one orthogonal frequency division multiplexing (OFDM) symbol,

wherein, when one OFDM symbol is used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed within the one OFDM symbol,

wherein, when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed across the two OFDM symbols alternately along the frequency axis, and

wherein a same fixed number of multiple resource sets is used for a case when one OFDM symbol is used for transmitting the ACK/NACK group and for a case when two OFDM symbols are used for transmitting the ACK/NACK group.

2. The method of claim 1, wherein each of the multiple resource sets occupies a predetermined number of closest available subcarriers.

3. The method of claim 1, wherein the multiple ACK/NACKs are multiplexed by further using phase components orthogonal to each other.

4. The method of claim 3, wherein the multiple ACK/NACKs within the ACK/NACK group are further distinguished by the phase components.

5. The method of claim 1, wherein when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, an even-numbered resource set among the multiple resource sets exists in a first OFDM symbol of the two OFDM symbols, and an odd-numbered resource set among the multiple resource sets exists in a second OFDM symbol of the two OFDM symbols.

6. The method of claim 1, wherein when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed across the two OFDM symbols alternately along the frequency axis, such that

a first resource set among the multiple resource sets exists in a first frequency location of the frequency axis in a first one of the two OFDM symbols,

a second resource set among the multiple resource sets exists in a second frequency location following the first frequency location in a second one of the two OFDM symbols, and

a third resource set among the multiple resource sets exists in a third frequency location following the second frequency location in the first one of the two OFDM symbols.

7. The method of claim 6, wherein the first frequency location, the second frequency location and the third frequency location are separate from each other along the frequency axis.

8. The method of claim 1, wherein a number of OFDM symbols used in one subframe for transmitting the ACK/NACK group is configured by a higher layer above a physical layer.

9. A method for receiving acknowledgement/non-acknowledgment (ACK/NACK) information, the method performed by a user equipment (UE) and comprising:

receiving an ACK/NACK group from a base station, through each of a fixed number of multiple resource sets which are distributed from each other along a frequency axis in a subframe,

wherein each of the multiple resource sets occupies a predetermined number of subcarriers and one orthogonal frequency division multiplexing (OFDM) symbol; and

demultiplexing the ACK/NACK group into multiple ACK/NACKs by using orthogonal codes, wherein the orthogonal codes distinguish the multiple ACK/NACKs within the ACK/NACK group from each other,

wherein, when one OFDM symbol is used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed within the one OFDM symbol,

wherein, when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed across the two OFDM symbols alternately along the frequency axis, and

wherein a same fixed number of multiple resource sets is used for a case when one OFDM symbol is used for transmitting the ACK/NACK group and for a case when two OFDM symbols are used for transmitting the ACK/NACK group.

10. The method of claim 9, wherein each of the multiple resource sets occupies a predetermined number of closest available subcarriers.

11. The method of claim 9, wherein the multiple ACK/NACKs are multiplexed by further using phase components orthogonal to each other.

12. The method of claim 11, wherein the multiple ACK/NACKs within the ACK/NACK group are further distinguished by the phase components.

13. The method of claim 9, wherein when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, an even-numbered resource set among the multiple resource sets exists in a first OFDM symbol of the two OFDM symbols, and an odd-numbered resource set among the multiple resource sets exists in a second OFDM symbol of the two OFDM symbols.

14. The method of claim 9, wherein when two OFDM symbols are used in one subframe for transmitting the ACK/NACK group, the multiple resource sets are distributed across the two OFDM symbols alternately along the frequency axis, such that

a first resource set among the multiple resource sets exists in a first frequency location of the frequency axis in a first one of the two OFDM symbols,

a second resource set among the multiple resource sets exists in a second frequency location following the first frequency location in a second one of the two OFDM symbols, and

a third resource set among the multiple resource sets exists in a third frequency location following the second frequency location in the first one of the two OFDM symbols.

15. The method of claim 14, wherein the first frequency location, the second frequency location and the third frequency location are separate from each other along the frequency axis.

16. The method of claim 9, wherein a number of OFDM symbols used in one subframe for transmitting the ACK/NACK group is configured by a higher layer above a physical layer.