Method and apparatus for allocating and acquiring ACK/NACK resources in a mobile communication system

• US 9,020,517 B2
• Filed: 12/10/2012
• Issued: 04/28/2015
• Est. Priority Date: 06/15/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Young-Bum, Cho, Joon-Young, Papasakellariou, Aris, Kwon, Hwan-Joon
• Primary Examiner(s): Sobutka, Philip
• Application Number:
  US13/709,900
• Publication Number:
  US 20130100904A1
• Time in Patent Office: 869 Days
• Field of Search: None
• US Class Current: 455/450
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• 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: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• 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 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and apparatus are provided for receiving ACK/NACK information by a base station. The method includes transmitting data and control information to at least one UE, the control information being transmitted through a downlink control channel including at least one CCE; checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and receiving the ACK/NACK information for the transmitted data using the checked resource.

Claims

1. A method for receiving Acknowledgement (ACK)/negative ACK (NACK) information by a base station in a mobile communication system, the method comprising:

transmitting data and control information to at least one user equipment (UE), the control information being transmitted on a downlink control channel including at least one control channel element (CCE);

checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and

receiving the ACK/NACK information for the transmitted data using the checked resource,

wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index increases until exhausted and then resets, the orthogonal sequence index increases each time the cyclic shift index is exhausted, until exhausted, and then resets, and the resource block index of resources for reception of the ACK/NACK increases each time the orthogonal sequence index is exhausted.

2. The method of claim 1, wherein the at least one CCE is a first CCE of the downlink control channel.

3. The method of claim 1, further comprising transmitting a cyclic shift offset value that indicates a number of sample intervals of which a sequence is cyclically shifted.

4. A method for transmitting Acknowledgement (ACK)/negative ACK (NACK) information by a user equipment (UE) in a mobile communication system, the method comprising:

receiving data and control information from a base station, the control information being received on a downlink control channel including at least one control channel element (CCE);

acquiring a resource for transmission of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and

transmitting the ACK/NACK information for the received data using the acquired resource,

wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index increases until exhausted and then resets, the orthogonal sequence index increases each time the cyclic shift index is exhausted, until exhausted, and then resets, and the resource block index of resources for reception of the ACK/NACK increases each time the orthogonal sequence index is exhausted.

5. The method of claim 4, wherein the at least one CCE is a first CCE of the downlink control channel.

6. The method of claim 4, further comprising:

receiving a cyclic shift offset value that indicates a number of sample intervals of which a sequence is cyclically shifted; and

acquiring the number of sample intervals of which the sequence is cyclically shifted.

7. A base station for receiving Acknowledgement (ACK)/negative ACK (HACK) information in a mobile communication system, the base station apparatus-comprising:

a transmitter for transmitting data and control information to at least one user equipment (UE), the control information being transmitted on a downlink control channel including at least one control channel element (CCE);

a controller for checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and

a receiver for receiving the ACK/NACK information for the transmitted data using the checked resource,

wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index increases until exhausted and then resets, the orthogonal sequence index increases each time the cyclic shift index is exhausted, until exhausted, and then resets, and the resource block index of resources for reception of the ACK/NACK increases each time the orthogonal sequence index is exhausted.

8. The base station of claim 7, wherein the at least one CCE is a first CCE of the downlink control channel.

9. The base station of claim 7, wherein the transmitter transmits a cyclic shift offset value that indicates a number of sample intervals of which a sequence is cyclically shifted.

10. A user equipment (UE) for transmitting Acknowledgement (ACK)/negative ACK (HACK) information in a mobile communication system, the UE comprising:

a receiver for receiving data and control information from a base station, the control information being received on a downlink control channel including at least one control channel element (CCE);

a controller for acquiring a resource for transmission of an ACK/NACK mapped to at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and

a transmitter for transmitting the ACK/NACK information for the received data using the acquired resource,

wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index increases until exhausted and then resets, the orthogonal sequence index increases each time the cyclic shift index is exhausted, until exhausted, and then resets, and the resource block index of resources for reception of the ACK/NACK increases each time the orthogonal sequence index is exhausted.

11. The UE of claim 10, wherein the at least one CCE is a first CCE of the downlink control channel.

12. The UE of claim 10, wherein the receiver receives a cyclic shift offset value that indicates a number of sample intervals of which a sequence is cyclically shifted, and the controller acquires the number of sample intervals of which the sequence is cyclically shifted.