Method for transmitting and receiving uplink signal, user equipment, and base station

Patent metadata

Field	Value
Publication number	US-9491740-B2
Application number	US-201214125478-A
Country	US
Kind code	B2
Filing date	Jun 28, 2012
Priority date	Jun 28, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The present invention categorizes a plurality of cells that are configured to a user equipment into at least one cell group, and configures an anchor cell for each of the cell groups. The anchor cell for each of the cell groups is used for transmitting a PUCCH, which carries uplink control information on a pertinent cell group, and in a random access process for acquiring a timing advance with respect to the pertinent cell group. When the uplink control information is transmitted from a PUSCH of one cell, the PUSCH carries only the uplink control information on the cell group to which the one cell belongs and does not carry information on another cell group.

First claim

The invention claimed is:

1. A method for receiving, by a user equipment configured with a plurality of serving cells, signals, the method comprising:
configuring, by the user equipment, a primary cell (PCell) group comprised of a PCell and zero or more secondary cells (SCells) among the plurality of serving cells and an SCell group comprised of one or more SCells among the plurality of serving cells, the SCell group not including the PCell and the zero or more SCells belonging to the PCell group;
receiving, by the user equipment, a physical downlink control channel (PDCCH) carrying an uplink grant or downlink grant for a scheduled cell, which is one of the plurality of serving cells, through a scheduling cell among the plurality of serving cells; and
performing, by the user equipment, a physical uplink shared channel (PUSCH) transmission through the scheduled cell according to the uplink grant or a physical downlink shared channel (PDSCH) reception through the scheduled cell according to the downlink grant,
wherein the scheduled cell belongs to the PCell group when the scheduling cell belongs to the PCell group, and the scheduled cell belongs to the SCell group when the scheduled cell belongs to the SCell group.

2. The method according to claim 1 , further comprising:
transmitting, by the user equipment, a physical uplink control channel (PUCCH) carrying uplink control information (UCI) for the SCell group,
wherein the PUCCH carrying the UCI for the SCell group is transmitted on an SCell configured as an anchor SCell among the one or more SCells belonging to the SCell group.

3. The method according to claim 2 , further comprising:
adjusting uplink transmission timing for the PCell group based on a random access procedure using the PCell; and
adjusting uplink transmission timing for the SCell group based on a random access procedure using the anchor SCell.

4. The method according to claim 2 , wherein:
the scheduling cell belongs to the SCell group and the scheduling cell is the anchor SCell, and
the PUCCH carrying the UCI for the SCell group is transmitted using a PUCCH resource associated with a control channel element (CCE) of the PDCCH received through the scheduled cell when the UCI for the SCell group is acknowledgement/negative acknowledgement (ACK/NACK) information for the SCell group.

5. The method according to claim 2 , wherein the scheduling cell belongs to the SCell group, and the method further comprises:
determining a transmit power of the PUCCH based on transmit power control (TPC) information in the PDCCH when the PDCCH carries a downlink grant for the anchor SCell; and
determining a PUCCH resource for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information for the SCell group based on the TPC information when the PDCCH carries a downlink grant for an SCell other than the anchor SCell among the one or more SCells belonging to the SCell group.

6. The method according to claim 2 , wherein the anchor SCell is a scheduling cell for at least one SCell in the SCell group.

7. A user equipment for receiving signals, wherein the user equipment is configured with a plurality of serving cells, the user equipment comprising:
a radio frequency (RF) unit; and
a processor configured to control the RF unit,
wherein the processor is further configured to:
configure a primary cell (PCell) group comprised of a PCell and zero or more secondary cells (SCells) among the plurality of serving cells and an SCell group comprised of one or more SCells among the plurality of serving cells, the SCell group not including the PCell and the zero or more SCells belonging to the PCell group,
control the RF unit to receive a physical downlink control channel (PDCCH) carrying an uplink grant or downlink grant for a scheduled cell, which is one of the plurality of serving cells, through a scheduling cell among the plurality of serving cells, and
control the RF unit to perform a physical uplink shared channel (PUSCH) transmission through the scheduled cell according to the uplink grant or a physical downlink shared channel (PDSCH) reception through the scheduled cell according to the downlink grant, and

wherein the scheduled cell belongs to the PCell group when the scheduling cell belongs to the PCell group, and the scheduled cell belongs to the SCell group when the scheduled cell belongs to the SCell group.

8. The user equipment according to claim 7 , wherein:
the processor controls the RF unit to transmit a physical uplink control channel (PUCCH) carrying uplink control information (UCI) for the SCell group, and
the PUCCH carrying the UCI for the SCell group is transmitted on an SCell configured as an anchor SCell among the one or more SCells belonging to the SCell group.

9. The user equipment according to claim 8 , wherein the processor adjusts uplink transmission timing for the PCell group based on a random access procedure using the PCell, and adjusts uplink transmission timing for the SCell group based on a random access procedure using the anchor SCell.

10. The user equipment according to claim 8 , wherein:
the scheduling cell belongs to the SCell group and the scheduling cell is the anchor SCell, and
the processor controls the RF unit to transmit the PUCCH carrying the UCI for the SCell group using a PUCCH resource associated with a control channel element (CCE) of the PDCCH when the UCI for the SCell group is acknowledgement/negative acknowledgement (ACK/NACK) information for the SCell group.

11. The user equipment according to claim 8 , wherein:
the scheduling cell belongs to the SCell group, and
the processor determines transmit power of the PUCCH based on transmit power control (TPC) information in the PDCCH when the PDCCH carries a downlink grant for the anchor SCell, and determines a PUCCH resource for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information for the SCell group based on the TPC information when the PDCCH carries a downlink grant for an SCell other than the anchor SCell among the one or more SCells belonging to the SCell group.

12. The user equipment according to claim 8 , wherein the anchor SCell is a scheduling cell for at least one SCell in the SCell group.

Assignees

• Yang Suckchel
• Kim Mingyu
• Ahn Joonkui
• Seo Dongyoun
• Lg Electronics Inc

Inventors

• Yang Suckchel
• Kim Mingyu
• Ahn Joonkui
• Seo Dongyoun

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title