Method of transmitting and receiving ACK/NACK signal and apparatus thereof

• US 9,237,566 B2
• Filed: 10/14/2011
• Issued: 01/12/2016
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: Park, Dong Hyun
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): Ko, Sithu
• Application Number:
  US13/877,827
• Publication Number:
  US 20130195065A1
• Time in Patent Office: 1,551 Days
• Field of Search: 370/329
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed is a method for transmitting an ACK/NACK signal for an HARQ (Hybrid Automatic Repeat reQuest) in a CA (Carrier Aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ACK/NACK signal, and transmitting modulation symbols corresponding to a transmission target ACK/NACK signal in the first table by using transmission resource corresponding to the transmission target ACK/NACK signal in the first table.

Claims

1. A method for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARQ) by a user equipment (UE) in a carrier aggregation (CA) system, the method comprising:

receiving, from a base station (BS), downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating at least two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively configured by a higher layer, wherein n is an integer;

mapping, based on a channel selection, an ACK/NACK in response to the downlink data transmission onto a combination of one of the two ACK/NACK resource and a modulation symbol; and

transmitting, to the BS, the ACK/NACK by using the combination.

2. The method of claim 1, wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer, and n is an integer between 1 and 4.

3. The method of claim 1, wherein if the 2 bits are ‘

00’

, the two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

01’

, the two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

10’

, the two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set respectively; and

if the 2 bits are ‘

11’

, the two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set respectively.

4. The method of claim 1, wherein at least one of the two ACK/NACK resources is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and

wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.

5. A user equipment (UE) for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARD) in a carrier aggregation (CA) system, the UE comprising:

a transceiver to receive, from a base station (BS), downlink control information (DCI) controlling downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer; and

a signal processor to map, based on a channel selection, an ACK/NACK in response to the downlink data transmission onto a combination of one of the two ACK/NACK resources and a modulation symbol,

wherein the transceiver transmits, to the BS, the ACK/NACK by using the combination.

6. The UE of claim 5, wherein if the 2 bits are ‘

00’

, the two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

01’

, the two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

10’

, the two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set respectively; and

if the 2 bits are ‘

11’

, the two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set respectively.

7. The UE of claim 5, wherein at least one of the two ACK/NACK resource is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.

8. A method for receiving an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARD) by a base station (BS) in a carrier aggregation (CA) system, the method comprising:

configuring downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer;

transmitting the DCI to a user equipment (UE); and

receiving, from the UE, an ACK/NACK in response to the downlink data transmission,

wherein the ACK/NACK is mapped, based on a channel selection, onto a combination of one of the two ACK/NACK resources and a modulation symbol, and the ACK/NACK is received by using the combination.

9. The method of claim 8, wherein if the 2 bits are ‘

00’

, the two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

01’

, the two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

10’

, the two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set respectively; and

if the 2 bits are ‘

11’

, the two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set respectively.

13. The method of claim 8, wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer, and n is an integer between 1 and 4.

14. The method of claim 13, wherein at least one of the two ACK/NACK resources is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and

wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.

10. A base station (BS) for receiving an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARQ) in a carrier aggregation (CA) system, the BS comprising:

a signal processor to configure downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer; and

a transceiver to transmit the DCI to a user equipment (UE) and to receive an ACK/NACK in response to the downlink data transmission from the UE,

wherein the ACK/NACK is mapped, based on a channel selection, onto a combination of one of the two ACK/NACK resources and a modulation symbol, and the ACK/NACK is received by using the combination.

11. The BS of claim 10, wherein if the 2 bits are ‘

00’

, the two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

01’

, the two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set respectively;

if the 2 bits are ‘

10’

, the two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set respectively; and

if the 2 bits are ‘

11’

, the two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set respectively.

12. The BS of claim 10, wherein at least one of the two ACK/NACK resource is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and

wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.

15. The BS of claim 10, wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer, and n is an integer between 1 and 4.