Method for transmitting control information in wireless communication systems

• US 10,917,877 B2
• Filed: 01/22/2019
• Issued: 02/09/2021
• Est. Priority Date: 06/21/2007
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Ko, Young-Jo, Park, Hyeong-Geun, Kim, Il-Gyu, Chang, Kapseok, Yi, Hyoseok, Kim, Young-Hoon, Bang, Seung-Chan
• Primary Examiner(s): Choi, Eunsook
• Application Number:
  US16/253,260
• Publication Number:
  US 20190159190A1
• Time in Patent Office: 749 Days
• Field of Search: None
• CPC Class Codes: H04J 13/0048 Walsh
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/003 Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1692 Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 23/02 adapted for orthogonal signalling
• CPC Class Codes: H04L 5/0017 in which a distinct code is applied, as a temporal sequence, to each frequency
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.

Claims

1. A communication method comprising:

transmitting, at a base station, first information to a first terminal, wherein the first information indicates a cyclically shifted sequence, a first orthogonal sequence and a first set of uplink radio resources;

transmitting, at the base station, second information to a second terminal, wherein the second information indicates the cyclically shifted sequence, a second orthogonal sequence and the first set of uplink radio resources;

receiving, at the base station, a first signal through the first set of uplink radio resources;

obtaining, at the base station, first control information from the first signal, by using the cyclically shifted sequence and the first orthogonal sequence; and

obtaining, at the base station, second control information from the first signal, by using the cyclically shifted sequence and the second orthogonal sequence,

wherein first two elements of the first orthogonal sequence are orthogonal to first two elements of the second orthogonal sequence and last two elements of the first orthogonal sequence are orthogonal to last two elements of the second orthogonal sequence.

2. The method of claim 1, wherein:

the first orthogonal sequence is one of three orthogonal sequences consisting of W0 (a, a, a, a), W1 (a, b, a, b) and an additional sequence W2 which is orthogonal to W0 and W1, respectively, wherein a is a first value and b is a second value.

3. The method of claim 2, wherein:

the first orthogonal sequence is W0 and the second orthogonal sequence is W2, or the first orthogonal sequence is W2 and the second orthogonal sequence is W0.

4. The method of claim 2, wherein the first value is ‘

+1’ and

the second value is ‘

−

1’

.

5. The method of claim 1, further comprising:

receiving, at the base station, a second signal through a second set of uplink radio resources;

obtaining, at the base station, a first reference sequence from the second signal; and

obtaining, at the base station, a second reference sequence from the second signal;

wherein;

the first set of uplink radio resources comprises a first, second, sixth and seventh symbols in a time slot, and

the second set of uplink radio resources comprises third to fifth symbols in the time slot.

6. The method of claim 1, wherein the first control information is acknowledgement/negative-acknowledgement (ACK/NAK) information.

7. The method of claim 6, wherein the second control information is another ACK/NAK information.

8. The method of claim 1, wherein the cyclically shifted sequence is generated based on a Zadoff-Chu sequence.

9. A wireless communication apparatus comprising:

a circuitry;

wherein the circuitry is configured to;

cause the apparatus to transmit first information to a first terminal, wherein the first information indicates a cyclically shifted sequence, a first orthogonal sequence and a first set of uplink radio resources;

cause the apparatus to transmit second information to a second terminal, wherein the second information indicates the cyclically shifted sequence, a second orthogonal sequence and the first set of uplink radio resources;

cause the apparatus to receive a first signal through the first set of uplink radio resources;

obtain first control information from the first signal, by using the cyclically shifted sequence and the first orthogonal sequence; and

obtain second control information from the first signal, by using the cyclically shifted sequence and the second orthogonal sequence,

wherein first two elements of the first orthogonal sequence are orthogonal to first two elements of the second orthogonal sequence and last two elements of the first orthogonal sequence are orthogonal to last two elements of the second orthogonal sequence.

10. The apparatus of claim 9, wherein:

the first orthogonal sequence is one of three orthogonal sequences consisting of W0 (a, a, a, a), W1 (a, b, a, b) and an additional sequence W2 which is orthogonal to W0 and W1, respectively, wherein a is a first value and b is a second value.

11. The apparatus of claim 10, wherein:

the first orthogonal sequence is W0 and the second orthogonal sequence is W2, or the first orthogonal sequence is W2 and the second orthogonal sequence is W0.

12. The apparatus of claim 9, wherein the circuitry is further configured to:

cause the apparatus to receive a second signal through a second set of uplink radio resources;

obtain a first reference sequence from the second signal; and

obtain a second reference sequence from the second signal;

wherein;

the first set of uplink radio resources comprises a first, second, sixth and seventh symbols in a time slot, and

the second set of uplink radio resources comprises third to fifth symbols in the time slot.

13. The apparatus of claim 9, wherein the first control information is acknowledgement/negative-acknowledgement (ACK/NAK) information.

14. The apparatus of claim 13, wherein the second control information is another ACK/NAK information.

15. A device for a wireless communication apparatus, comprising:

a circuitry,

wherein the circuitry is configured to;

cause the apparatus to transmit first information to a first terminal, wherein the first information indicates a cyclically shifted sequence, a first orthogonal sequence and a first set of uplink radio resources;

cause the apparatus to transmit second information to a second terminal, wherein the second information indicates the cyclically shifted sequence, a second orthogonal sequence and the first set of uplink radio resources;

cause the apparatus to receive a first signal through the first set of uplink radio resources;

obtain first control information from the first signal, by using the cyclically shifted sequence and the first orthogonal sequence; and

obtain second control information from the first signal, by using the cyclically shifted sequence and the second orthogonal sequence,

wherein first two elements of the first orthogonal sequence are orthogonal to first two elements of the second orthogonal sequence and last two elements of the first orthogonal sequence are orthogonal to last two elements of the second orthogonal sequence.

16. The device of claim 15, wherein:

the first orthogonal sequence is one of three orthogonal sequences consisting of W0 (a, a, a, a), W1 (a, b, a, b) and an additional sequence W2 which is orthogonal to W0 and W1, respectively, wherein a is a first value and b is a second value.

17. The device of claim 16, wherein:

the first orthogonal sequence is W0 and the second orthogonal sequence is W2, or the first orthogonal sequence is W2 and the second orthogonal sequence is W0.

18. The device of claim 15, wherein the circuitry is further configured to:

cause the apparatus to receive a second signal through a second set of uplink radio resources;

obtain a first reference sequence from the second signal; and

obtain a second reference sequence from the second signal;

wherein;

the first set of uplink radio resources comprises a first, second, sixth and seventh symbols in a time slot, and

the second set of uplink radio resources comprises third to fifth symbols in the time slot.

19. The device of claim 15, wherein the first control information is acknowledgement/negative-acknowledgement (ACK/NAK) information.

20. The device of claim 19, wherein the second control information is another ACK/NAK information.