CONFIGURATION AND MAPPING OF UPLINK CONTROL CHANNEL RESOURCE

• US 20140050165A1
• Filed: 07/29/2013
• Published: 02/20/2014
• Est. Priority Date: 08/16/2012
• Status: Active Grant

• Current Assignee: Google Inc. (Alphabet Inc.)
• Original Assignee: KT Corporation
• Inventors: PARK, Kyujin
• Granted Patent: US 9,655,087 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The disclosure is related to configuration and mapping of uplink control channel resources. Particularly, the present disclosure relates to configuring and mapping uplink control channel resources for user equipment receiving downlink control information through a downlink control channel newly defined in a data region. Furthermore, the present disclosure relates to configuring and mapping uplink control channel resources for uplink HARQ-ACK/NACK feedback of user equipment. Herein, the uplink HARQ-ACK/NACK feedback may be performed by the user equipment in response to a downlink data channel assigned according to downlink scheduling information transmitted through such new downlink control channel.

Claims

1. A method of configuring an uplink control channel resource in a transmission/reception point transmitting control information for user equipment through a data region of resource-block pairs in a subframe, the method comprising:

assigning at least one enhanced physical downlink control channel (EPDCCH) set, wherein each EPDCCH set includes an X number of resource-block pairs in the subframe, and the X is a natural number which is greater than or equal to “

1” and

is less than or equal to the number of physical resource-block pairs (PRB pairs) associated with a downlink bandwidth; and

transmitting information indicating an uplink control channel resource starting offset for each of the at least one EPDCCH set, to the user equipment.

2. The method of claim 1, wherein:

the control information includes downlink scheduling information, transmitted through at least one enhanced control channel element (ECCE) included in one EPDCCH set of the at least one EPDCCH set; and

the information indicating the uplink control channel resource starting offset and a lowest index of the at least one ECCE are used as resource determination components, in the case of an uplink control channel resource mapping for ACK/NACK associated with a physical downlink shared channel (PDSCH) assigned according to the downlink scheduling information.

3. The method of claim 2, wherein:

the downlink scheduling information includes dynamic offset indication information; and

the dynamic offset indication information is used as another resource determination component, in the case of the uplink control channel resource mapping for the ACK/NACK associated with the PDSCH assigned according to the downlink scheduling information.

4. The method of claim 2, wherein antenna port information associated with a transmission of the downlink scheduling information is used as another resource determination component, in the case of the uplink control channel resource mapping for the ACK/NACK associated with the PDSCH assigned according to the downlink scheduling information.

5. The method of claim 1, wherein the transmitting includes:

transmitting the information indicating the uplink control channel resource starting offset to the user equipment by a higher-layer signaling.

6. A method of mapping an uplink control channel resource in user equipment, the method comprising:

receiving information indicating an uplink control channel resource starting offset for each of at least one enhanced physical downlink control channel (EPDCCH) set, from a transmission/reception point, wherein each EPDCCH set includes an X number of resource-block pairs in the subframe, and the X is a natural number which is greater than or equal to “

1” and

is less than or equal to the number of physical resource-block pairs (PRB pairs) associated with a downlink bandwidth;

receiving downlink scheduling control information through at least one enhanced control channel element (ECCE) included in one EPDCCH set of the at least one EPDCCH set, from the transmission/reception point; and

performing an uplink control channel resource mapping for ACK/NACK associated with a physical downlink shared channel (PDSCH) assigned according to the downlink scheduling control information, using the information indicating the uplink control channel resource starting offset and a lowest index of the at least one ECCE as resource determination components.

7. The method of claim 6, wherein:

the downlink scheduling control information includes dynamic offset indication information; and

the performing includes performing the uplink control channel resource mapping using the dynamic offset indication information as another resource determination component.

8. The method of claim 6, wherein the receiving information indicating an uplink control channel resource starting offset includes:

receiving the information indicating the uplink control channel resource starting offset, by a higher-layer signaling.

9. The method of claim 6, wherein the performing includes:

performing the uplink control channel resource mapping, using antenna port information associated with transmission of the uplink scheduling control information as another resource determination component.

10. A transmission/reception point transmitting control information for user equipment through a data region of resource-block pairs in a subframe, the transmission/reception point comprising:

a control processor configured to assign at least one enhanced physical downlink control channel (EPDCCH) set, wherein each EPDCCH set includes an X number of resource-block pairs in the subframe, and the X is a natural number which is greater than or equal to “

1” and

is less than or equal to the number of physical resource-block pairs (PRB pairs) associated with a downlink bandwidth; and

a transmitter configured to transmit information indicating an uplink control channel resource starting offset for each of the at least one EPDCCH set, to the user equipment.

11. The transmission/reception point of claim 10, wherein:

the control information includes downlink scheduling information, and is transmitted through at least one enhanced control channel element (ECCE) included in one EPDCCH set of the at least one EPDCCH set; and

the information indicating the uplink control channel resource starting offset and a lowest index of the at least one ECCE are used as resource determination components, in the case of an uplink control channel resource mapping for ACK/NACK associated with a physical downlink shared channel (PDSCH) assigned according to the downlink scheduling information.

12. The transmission/reception point of claim 11, wherein:

the downlink scheduling information includes dynamic offset indication information; and

the dynamic offset indication information is used as another resource determination component, in the case of the uplink control channel resource mapping for the ACK/NACK associated with the PDSCH assigned according to the downlink scheduling information.

13. The transmission/reception point of claim 11, wherein antenna port information associated with transmission of the downlink scheduling information is used as another resource determination component, in the case of the uplink control channel resource mapping for the ACK/NACK associated with the PDSCH assigned according to the downlink scheduling information.

14. The transmission/reception point of claim 10, wherein the transmitter is configured to transmit the information indicating the uplink control channel resource starting offset to the user equipment by a higher-layer signaling.

15. User equipment comprising:

a receiver configured to;

(a) receive information indicating an uplink control channel resource starting offset for each of at least one enhanced physical downlink control channel (EPDCCH) set, from a transmission/reception point, wherein each EPDCCH set includes an X number of resource-block pairs in the subframe, and the X is a natural number which is greater than or equal to “

1” and

is less than or equal to the number of physical resource-block pairs (PRB pairs) associated with a downlink bandwidth, and

(b) receive downlink scheduling control information through at least one enhanced control channel element (ECCE) included in one EPDCCH set of the at least one EPDCCH set, from the transmission/reception point; and

a control processor configured to perform an uplink control channel resource mapping for ACK/NACK associated with a physical downlink shared channel (PDSCH) assigned according to the downlink scheduling control information, using the information indicating the uplink control channel resource starting offset and a lowest index of the at least one ECCE as resource determination components.

16. The user equipment of claim 15, wherein:

the downlink scheduling control information includes dynamic offset indication information; and

the control processor is configured to perform the uplink control channel resource mapping using the dynamic offset indication information as another resource determination component.

17. The user equipment of claim 15, wherein the receiver is configured to receive the information indicating the uplink control channel resource starting offset, by a higher-layer signaling.

18. The user equipment of claim 15, wherein the control processor is configured to perform the uplink control channel resource mapping, using antenna port information associated with a transmission of the downlink scheduling control information as another resource determination component.