Control information feedback for ecc on pcell

Patent metadata

Field	Value
Publication number	US-2016205679-A1
Application number	US-201514984339-A
Country	US
Kind code	A1
Filing date	Dec 30, 2015
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

Described herein are methods, systems, and apparatus for communicating control information over a primary component carrier (PCell). In one example, a method for wireless communication is described that includes communicating using an enhanced component carrier (eCC) on at least a secondary component carrier (SCell) in a carrier aggregation (CA) configuration. The method may also include using a PCell for control information pertaining to communications on the eCC. The control information may be channel state information (CSI) or acknowledgment/negative-acknowledgment (ACK/NACK) feedback information.

First claim

What is claimed is:

1 . A method for wireless communication, comprising:
communicating using an enhanced component carrier (eCC) on at least a secondary component carrier (SCell) in a carrier aggregation (CA) configuration; and using a primary component carrier (PCell) for control information pertaining to communications on the eCC.

2 . The method of claim 1 , wherein communicating using the eCC comprises:
communicating on an unlicensed radio frequency spectrum band or a shared radio frequency spectrum band.

3 . The method of claim 1 , wherein using the PCell for control information further comprises:
sending or receiving channel state information (CSI) related to the eCC.

4 . The method of claim 3 , further comprising:
receiving a grant comprising a trigger for aperiodic CSI feedback; and determining a carrier of the PCell or SCell for transmission of the aperiodic CSI feedback.

5 . The method of claim 3 , wherein sending or receiving CSI further comprises:
sending or receiving the CSI on one or both of a physical uplink control channel (PUCCH) of the PCell and a physical uplink shared channel (PUSCH) of the PCell.

6 . The method of claim 3 , wherein determining the carrier comprises:
determining the carrier based at least in part on any of a cell on which the grant is received, a cell which is scheduled by the grant, or combinations thereof.

7 . The method of claim 1 , wherein using the PCell for control information further comprises:
sending or receiving, in response to data received via the eCC, one of a downlink acknowledgment/negative-acknowledgment (ACK/NACK) feedback information and an uplink ACK/NACK feedback information.

8 . The method of claim 7 , further comprising:
identifying ACK/NACK feedback information for a plurality of code blocks received on an eCC of the SCell, the plurality of code blocks received in a plurality of scheduled transport blocks; and identifying a feedback subframe of the PCell for providing the ACK/NACK feedback information based at least in part on a subframe of the PCell for which transmissions of the plurality code blocks received on the eCC are completed, wherein sending or receiving one of the downlink ACK/NACK and the uplink ACK/NACK further comprises transmitting the ACK/NACK feedback information via the PCell in the identified feedback subframe.

9 . The method of claim 8 , wherein the PCell comprises a downlink primary component carrier and a frequency division duplex (FDD) uplink primary component carrier, and wherein the feedback subframe has a predetermined offset from the subframe of the PCell for which the transmissions of the plurality of code blocks received on the eCC completed.

10 . The method of claim 8 , wherein the PCell comprises a time division duplex (TDD) component carrier, and wherein the feedback subframe comprises a first uplink subframe of the TDD component carrier after a predetermined offset from the subframe of the PCell for which the transmissions of the plurality of code blocks received on the eCC completed.

11 . The method of claim 7 , wherein using the PCell to send or receive control information further comprises:
sending the uplink ACK/NACK in response to eCC downlink data on one or both of a physical uplink control channel (PUCCH) of the PCell and a physical uplink shared channel (PUSCH) of the PCell or sending the downlink ACK/NACK in response to eCC uplink data on at least one of a physical hybrid automatic repeat request (ARQ) indicator channel (PHICH) of the PCell, an enhanced PHICH (ePHICH) of the PCell, a physical downlink shared channel (PDSCH) of the PCell, and combinations thereof.

12 . The method of claim 7 , wherein communicating one of the downlink ACK/NACK and the uplink ACK/NACK further comprises:
communicating a block ACK/NACK containing multiple ACK/NACKs corresponding to multiple eCC downlink data or multiple eCC uplink data.

13 . The method of claim 12 , wherein communicating the block ACK/NACK further comprises:
indicating that the multiple ACK/NACKs correspond to multiple users transmitting the data received via the eCC.

14 . The method of claim 12 , further comprising:
receiving downlink transmission index information within downlink grants associated with the plurality of scheduled transport blocks.

15 . The method of claim 7 , further comprising:
determining that a number of ACK/NACK bits of the ACK/NACK feedback information exceeds a capacity of a PUCCH format used for transmitting the ACK/NACK feedback information; and determining a plurality of PUCCH resources for transmission of the ACK/NACK feedback information, wherein sending or receiving the ACK/NACK feedback information further comprises transmitting a plurality of PUCCH transmissions using the plurality of PUCCH resources.

16 . The method of claim 1 , further comprising:
sending a downlink grant that identifies one or both of time and frequency resources for physical downlink shared channel (PDSCH) transmission on the eCC; and refraining from sending downlink data in response to a failure to gain access to a medium identified in the downlink grant using the identified time or frequency resources.

17 . The method of claim 1 , further comprising:
sending a downlink grant that identifies multiple time and frequency resources for physical downlink shared channel (PDSCH) transmission on the eCC; and refraining from sending downlink data in response to a failure to gain access to a medium identified in the downlink grant using one of the multiple time or frequency resources.

18 . The method of claim 1 , further comprising:
sending a downlink grant that identifies an expiration time for physical downlink shared channel (PDSCH) transmission on the eCC; and refraining from sending downlink data in response to a failure to gain access to a medium identified in the downlink grant by the expiration time.

19 . The method of claim 1 , further comprising:
receiving an uplink grant that identifies one or both of time and frequency resources for a physical uplink shared channel (PUSCH) transmission on the eCC; and refraining from sending uplink data in response to a failure to gain access to a medium identified in the uplink grant using the identified times or frequency resources.

20 . The method of claim 1 , further comprising:
receiving an uplink grant that identifies an expiration time for a physical uplink shared channel (PUSCH) transmission on the eCC; and refraining from sending uplink data in response to a failure to gain access to a medium identified in the uplink grant by the expiration time.

21 . An apparatus for wireless communication, comprising:
means for communicating using an enhanced component carrier (eCC) on at least a secondary component carrier (SCell) in a carrier aggregation (CA) configuration; and means for using a primary component carrier (PCell) for control information pertaining to communications on the eCC.

22 . The apparatus of claim 21 , wherein means for using the PCell for control information further comprises:
means for sending or receiving channel state information (CSI) related to the eCC.

23 . The apparatus of claim 21 , wherein means for using the PCell for control information further comprises:
means for sending or receiving, in response to data received via the eCC, one of a downlink acknowledgment/negative-acknowledgment (ACK/NACK) feedback information and an uplink ACK/NACK feedb

Assignees

• Qualcomm Inc

Inventors

• Yoo Taesang
• Malladi Durga Prasad
• Wei Yongbin
• Damnjanovic Jelena
• Damnjanovic Aleksandar

Classifications

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L1/1854 Primary

  Scheduling and prioritising arrangements · CPC title