Method and apparatus for supporting carrier aggregation

Patent metadata

Field	Value
Publication number	US-9155044-B2
Application number	US-201414329113-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Mar 16, 2009
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

The present invention relates to a method and to an apparatus for supporting carrier aggregation. More particularly, the present invention relates to a method for enabling user equipment to receive a signal from a base station in a wireless communication system which supports carrier aggregation, wherein said the method comprises the steps of: setting a first component carrier to a paused state; receiving state change information for the first component carrier via the second component carrier during the paused state of the first component carrier; and monitoring a control channel via the first component carrier if the state change information indicates a predetermined value. The present invention also relates to an apparatus for the method.

First claim

The invention claimed is:

1. A method of performing power management at a user equipment (UE) in a wireless communication system, the method comprising:
configuring, by the UE, a DRX (Discontinuous Reception) cycle, the DRX cycle including a DRX ON duration and a DRX opportunity,
wherein the same DRX ON duration is applied to all of two or more activated component carriers; and
monitoring, by the UE, a PDCCH (Physical Downlink Control CHannel) for each of the two or more activated component carriers during the DRX ON duration of every DRX cycle, the two or more activated component carriers including an activated primary component carrier assigned to the UE and at least one activated non-primary component carrier assigned to the UE and excluding any deactivated non-primary component carriers assigned to the UE,
wherein non-primary component carrier activation/deactivation is indicated using a field of Layer 2 (L2) message, the field having a fixed bit size regardless of a number of configured component carriers.

2. The method of claim 1 , wherein the PDCCH monitoring is not performed on the two or more activated component carriers during the DRX opportunity.

3. The method of claim 1 , further comprising:
configuring the at least one activated non-primary component carrier to a deactivated state; and
receiving state change information for the deactivated at least one non-primary component carrier through a PDCCH of the activated primary component carrier while the at least one non-primary component carrier is in the deactivated state.

4. The method of claim 3 , wherein the deactivated at least one non-primary component carrier is activated in response to detection of corresponding paging indication information or a corresponding paging message on the activated primary component carrier.

5. The method of claim 4 , wherein the deactivated at least one non-primary component carrier is activated when the state change information of the PDCCH on the activated primary component carrier indicates a predetermined value.

6. The method of claim 1 , further comprising:
performing a function, by the UE, based on the monitoring.

7. The method of claim 6 , wherein the function comprises one of:
receiving data via one of the two or more activated component carriers;
transmitting data via one of the two or more activated component carriers; and
performing power control.

8. A user equipment configured to perform power management in a wireless communication system, the user equipment comprising:
a Radio Frequency (RF) module; and
a processor configured to:
configure a DRX (Discontinuous Reception) cycle, the DRX cycle including a DRX ON duration and a DRX opportunity,
wherein the same DRX ON duration is applied to all of two or more activated component carriers; and
monitor a PDCCH (Physical Downlink Control CHannel) for each of the two or more activated component carriers during the DRX ON duration of every DRX cycle, the two or more activated component carriers including an activated primary component carrier assigned to the UE and at least one activated non-primary component carrier assigned to the UE and excluding any deactivated non-primary component carriers assigned to the UE,
wherein non-primary component carrier activation/deactivation is indicated using a field of Layer 2 (L2) message, the field having a fixed bit size regardless of a number of configured component carriers.

9. The user equipment of claim 8 , wherein the PDCCH monitoring is not performed on the two or more activated component carriers during the DRX opportunity.

10. The user equipment of claim 8 , wherein the processor is further configured to:
configure the at least one activated non-primary component carrier to a deactivated state; and
receive state change information for the deactivated at least one non-primary component carrier through a PDCCH of the activated primary component carrier while the at least one non-primary component carrier is in the deactivated state.

11. The user equipment of claim 10 , wherein the deactivated at least one non-primary component carrier is activated in response to detection of corresponding paging indication information or a corresponding paging message on the activated primary component carrier.

12. The user equipment of claim 11 , wherein the deactivated at least one non-primary component carrier is activated when the state change information of the PDCCH on the activated primary component carrier indicates a predetermined value.

13. The user equipment of claim 9 , wherein the processor is further configured to perform a function based on the monitoring.

14. The user equipment of claim 13 , wherein the function comprises one of:
receiving data via one of the two or more activated component carriers;
transmitting data via one of the two or more activated component carriers; and
performing power control.

Assignees

• Lg Electronics Inc

Inventors

• Chung Jae Hoon
• Kwon Yeong Hyeon
• Han Seung Hee
• Kim So Yeon

Classifications

• H04W72/23

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

• H04W76/048

  Electricity · mapped topic

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title

• H04L5/0053

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

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title