Method and apparatus for selecting and reselecting an uplink primary carrier

• US 10,136,417 B2
• Filed: 08/01/2014
• Issued: 11/20/2018
• Est. Priority Date: 03/12/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Gauvreau, Jean-Louis, Terry, Stephen E., Marinier, Paul, Pan, Kyle Jung-Lin
• Primary Examiner(s): Hsu, Alpus
• Application Number:
  US14/449,944
• Publication Number:
  US 20150023285A1
• Time in Patent Office: 1,572 Days
• 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: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• 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

Abstract

A method and apparatus are described for using an uplink (UL) primary carrier for long term evolution-advanced (LTE-A) to support hybrid automatic repeat request (HARQ) feedback, a channel quality indicator (CQI), a scheduling request (SR), power headroom, and at least one buffer status report in the context of asymmetrical deployment and symmetrical deployment. A method, implemented by a wireless transmit/receive unit (WTRU), for multi-carrier operations, includes transmitting control information on a physical uplink shared channel (PUSCH) on a condition that PUSCH transmissions are occurring on at least one of multiple uplink component carriers (UL CCs), and transmitting the control information on a physical uplink control channel (PUCCH) on a condition that the PUSCH transmissions by the WTRU are not occurring on any of the multiple UL CCs.

Claims

1. A method, implemented by a wireless transmit/receive unit (WTRU), for multi-carrier operations, the method comprising:

transmitting feedback information pertaining to a physical downlink shared channel (PDSCH) on a physical uplink shared channel (PUSCH) of one of multiple uplink component carriers (UL CCs) on a condition that PUSCH transmission is occurring on at least one of the multiple UL CCs on a current subframe; and

transmitting the feedback information on a physical uplink control channel (PUCCH) of a predetermined one of the multiple UL CCs on a condition that no PUSCH transmission by the WTRU is occurring on any of the multiple UL CCs on the current subframe.

2. The method of claim 1, wherein the feedback information is hybrid automatic reply request (HARQ) acknowledgement (ACK).

3. The method of claim 1, wherein the feedback information is transmitted on the predetermined one of the multiple UL CCs selected based on rank on a condition that PUSCH transmissions are occurring on at least two of the multiple UL CCs.

4. The method of claim 3, wherein rank information for the rank is signaled by higher layers.

5. The method of claim 1, wherein an UL CC used to transmit the feedback information on the PUCCH is signaled by higher layers.

6. The method of claim 1, wherein a serving cell used to transmit the feedback information on the PUCCH is signaled by higher layers.

7. A method, implemented by a wireless transmit/receive unit (WTRU), for multi-carrier operations, the method comprising:

transmitting feedback information pertaining to a physical downlink shared channel (PDSCH) on a physical uplink shared channel (PUSCH) of one of multiple uplink component carriers (UL CCs) on a condition that PUSCH transmission is occurring on at least one of the multiple UL CCs on a current subframe; and

transmitting the feedback information on a physical uplink control channel (PUCCH) of a predetermined one of multiple UL CCs on a condition that no PUSCH transmission by the WTRU is occurring on any of the multiple UL CCs on the current subframe.

8. The method of claim 7, wherein the feedback information is hybrid automatic reply request (HARQ) acknowledgement (ACK).

9. The method of claim 7, wherein the feedback information is transmitted on the predetermined one of the multiple UL CCs selected based on a rank on a condition that PUSCH transmissions are occurring on at least two of the multiple UL CCs.

10. The method of claim 9, wherein rank information for the rank is signaled by higher layers.

11. The method of claim 7, wherein an UL CC used to transmit the feedback information on the PUCCH is signaled by higher layers.

12. The method of claim 7, wherein a serving cell used to transmit the feedback information on the PUCCH Is signaled by higher layers.

13. A wireless transmit/receive unit (WTRU) configured for multi-carrier operations, comprising:

a transmitter;

a receiver;

a memory; and

a processor,

wherein the processor and the memory are configured to cause the transmitter to;

transmit feedback information pertaining to a physical downlink shared channel (PDSCH) on a physical uplink shared channel (PUSCH) of one of multiple uplink component carriers (UL CCs) on a condition that PUSCH transmission is occurring on at least one of the multiple UL CCs on a current subframe; and

transmit the feedback information on a physical uplink control channel (PUCCH) of a predetermined one of multiple UL CCs on a condition that no PUSCH transmission by the WTRU is occurring on any of the multiple UL CCs on the current subframe.

14. The WTRU of claim 13, wherein the feedback information Is hybrid automatic reply request (HARQ) acknowledgement (ACK).

15. The WTRU of claim 13, wherein the feedback information is transmitted on the predetermined one of the multiple UL CCs selected based on a rank on a condition that PUSCH transmissions are occurring on at least two of the multiple UL CCs.

16. The WTRU of claim 15, wherein rank information for the rank is signaled by higher layers.

17. The WTRU of claim 15, wherein an UL CC used to transmit the feedback information on the PUCCH is signaled by higher layers.

18. The WTRU of claim 15, wherein a serving cell used to transmit the feedback information on the PUCCH is signaled by higher layers.

19. A base station configured for multi-carrier operations, comprising:

a transmitter;

a receiver;

a memory; and

a processor,

wherein the processor and the memory are configured to cause the receiver to;

receive feedback information pertaining to a physical downlink shared channel (PDSCH) on a physical uplink shared channel (PUSCH) of one of multiple uplink component carriers (UL CCs) on a condition that PUSCH transmissions by a wireless transmit/receive unit (WTRU) are occurring on any of the multiple UL CCs on a current subframe; and

receive the feedback information on a physical uplink control channel (PUCCH) of a predetermined one of multiple UL CCs on a condition that no PUSCH transmission by the WTRU is occurring on any of the multiple UL CCs on the current subframe.

20. The base station of claim 19, wherein the feedback information is hybrid automatic reply request (HARQ) acknowledgement (ACK).

21. The base station of claim 20, wherein the feedback information is transmitted on the predetermined one of the multiple UL CCs selected based on a rank on a condition that PUSCH transmissions are occurring on at least two of the multiple UL CCs.

22. The base station of claim 21, wherein rank information for the rank is signaled by higher layers.