COMPONENT CARRIER ACTIVATION/DEACTIVATION IN MULTI-CARRIER SYSTEMS

• US 20110134774A1
• Filed: 11/19/2010
• Published: 06/09/2011
• Est. Priority Date: 11/19/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Olesen, Robert L., Marinier, Paul, Terry, Stephen E., Rudolf, Marian, Pelletier, Ghyslain
• Granted Patent: US 8,917,605 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/38 triggered by timers

Abstract

Methods and apparatus for addressing wireless transmit/receive unit (WTRU) behavior in response to configuration, configuration parameters and access issues related to the activation/deactivation process when the WTRU may be configured with multiple serving cells or carrier aggregation.

Claims

1. A method implemented at a wireless transmit/receive unit (WTRU) for handling carrier aggregation, comprising:

configuring the WTRU with a primary cell (PCell);

configuring the WTRU with at least one secondary cell (SCell); and

processing information based on a state of the at least one SCell.

2. The method of claim 1, wherein the information is a medium access control (MAC) control element (CE) activation/deactivation command, the WTRU configured to change the state of the at least one SCell in response to the activation/deactivation command.

3. The method of claim 1, wherein the information is an activation/deactivation command that is applied per configured SCell, the WTRU configured to change the state of the at least one SCell in response to the activation/deactivation command.

4. The method of claim 1, wherein the state of the at least one SCell is configured or inactive and the information is an activation command for the at least one SCell, further comprising:

triggering a power headroom report on a condition that the at least one SCell has configured uplink resources.

5. The method of claim 1, wherein the state of the at least one SCell is configured or inactive and the information is at least an activation command for the at least one SCell, further comprising:

determining from the information one of a physical downlink control channel monitoring configuration or a cross-carrier scheduling configuration.

6. The method of claim 1, wherein the information is a configured value for determining a starting symbol of a physical downlink shared channel for the at least one SCell for a cross-carrier scheduling configuration.

7. The method of claim 1, wherein the state of the at least one SCell is active and the information is a deactivation command for the at least one SCell, further comprising:

stop monitoring a physical downlink control channel for at the least one SCell; and

stop receiving downlink assignments or uplink grants associated with the at least one SCell.

8. The method of claim 1, wherein the information is a configured value indicating a cross-carrier scheduling configuration, further comprising:

determining which SCell signals downlink allocations and uplink grants.

9. The method of claim 1, wherein the information is a scheduling request transmission failure determination, further comprising:

releasing channel quality indicator, precoding matrix index, and rank indication reporting configuration for configured SCells.

10. The method of claim 1, wherein the information is a scheduling request transmission failure determination, further comprising:

releasing sounding reference signal reporting configuration for configured SCells.

11. The method of claim 1, wherein the information is an indication of radio resource controller connection re-establishment, further comprising:

releasing a configuration for the at least one SCell.

12. The method of claim 1, further comprising:

for each transport block, determining a content of the information to be transmitted based on a characteristic of the information, wherein the information is control information.

13. The method of claim 12, wherein a control information type is based on transmission for the at least SCell or a primary cell.

14. The method of claim 12, wherein a control information type is based on transmission of the control information in one of a physical uplink shared channel or concurrent transmissions in the physical uplink shared channel and a physical uplink control channel.

15. The method of claim 12, wherein a control information type is based on transmission of the control information in one of a specified physical uplink channel or concurrent transmissions in the physical uplink shared channel and a physical uplink control channel, different from non-control information uplink transmissions.

16. The method of claim 12, further comprising:

performing control information content for a primary cell.

17. The method of claim 12, further comprising:

performing control information content for each configured SCell.

18. The method of claim 1, wherein the at least one SCell includes downlink resources and uplink resources, an association between the downlink resources and the uplink resources based on dedicated signalling using an identity of the at least one SCell.

19. The method of claim 1, wherein the information is a medium access control (MAC) control element (CE) activation/deactivation command, the WTRU configured to change the state of the at least one SCell in response to the activation/deactivation command, the state being common for both downlink resources and uplink resources.

20. The method of claim 1, wherein the information is an activation/deactivation command that is applied per configured SCell, the WTRU configured to change the state of the at least one SCell in response to the activation/deactivation command, the state being common for both downlink resources and uplink resources.

21. A wireless transmit/receive unit (WTRU) configured for carrier aggregation, comprising:

a receiver;

a processor in communication with the receiver;

the processor configured to configure the WTRU with a primary cell (PCell);

the processor configured to configure the WTRU with at least one secondary cell (SCell); and

the processor configured to process information based on a state of the at least one SCell.

22. The WTRU of claim 21, wherein the information includes sounding reference signals which are not transmitted upon a condition that the state of the at least one SCell is deactivated.

23. The WTRU of claim 21, wherein the information includes at least one of channel quality indicator, precoding matrix index, and rank indication that are not reported upon a condition that the at least one SCell is deactivated.

24. The WTRU of claim 21, wherein the state of the at least one SCell is active and the information is a deactivation command deactivating the at least one SCell with respect to a handover event.

25. The WTRU of claim 21, wherein the state of the at least one SCell is inactive with respect to a handover event, a reconfiguration event or addition of the at least one SCell to a WTRU configuration.

26. The WTRU of claim 21, wherein the state of the at least one SCell is active and the information is a deactivation command for the at least one SCell, further comprising:

the processor configured to flush all hybrid automatic repeat request buffers associated with the at least one SCell.

27. The WTRU of claim 21, wherein the state of the at least one SCell is configured or inactive and the information is an activation command for the at least one SCell, further comprising:

a transmitter;

the processor in communication with the transmitter; and

the transmitter configured to transmit a power headroom report for each activated serving cell having configured uplink resources.

28. The WTRU of claim 21, wherein the state of the at least one SCell is configured or deactive and the information is an activation command for the at least one SCell, further comprising:

the processor and receiver configured to monitor a physical downlink control channel for at the least one SCell.