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US 9,544,804 B2Granted
Method and apparatus for transmitting and receiving power headroom report in a wireless communication system
AssigneeLG Electronics Inc.
InventorsSungjun Park, Sunghoon Jung, Seungjune Yi, Youngdae Lee
Life of this patent
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Abstract
The invention relates to a wireless communication system. A method for transmitting a power headroom report (PHR) from a terminal according to an embodiment of the present invention may include determining whether a time alignment timer (TAT) for a serving cell is operating; and transmitting, to a base station, a PHR including only the PHR on the serving cell in which the TAT is operating.
Claims7
A method for transmitting a power headroom report (PHR) from a user equipment (UE), the method comprising:
- determining, by the UE, that a PHR trigger condition is satisfied for at least one of a plurality of timing advance groups (TAGs) configured for the UE, each of the TAGs including a plurality of serving cells which share a common timing advance value, wherein the PHR trigger condition includes a case where a prohibit PHR-timer has expired and path loss for at least one serving cell has changed more than a predetermined value;
- and
- determining, by the UE, whether a time alignment timer (TAT) is running for the at least one TAG for which the PHR trigger condition is satisfied;
- generating, by the UE, a medium access control protocol data unit (MAC PDU), which includes, when it is determined that the TAT is running, power headroom information for one or more serving cells included in the at least one TAG for which the PHR trigger condition is satisfied;
- and
- transmitting, by the UE to a base station, the generated MAC PDU.
3 more elements
A user equipment (UE) for transmitting a power headroom report (PHR), the UE comprising:
- a reception module that receives a downlink signal from a base station;
- a transmission module that transmits an uplink signal to the base station;
- and
- a processor that:
- controls the UE, which includes the reception module and the transmission module,
- determines that a PHR trigger condition is satisfied for at least one of a plurality of timing advance groups (TAGs) configured for the UE, each of the TAGs including a plurality of serving cells which share a common timing advance value, wherein the PHR trigger condition includes a case where a prohibit PHR-timer has expired and path loss for at least one serving cell has changed more than a predetermined value;
- and
- determines whether a time alignment timer (TAT) is running for the at least one TAG for which the PHR trigger condition is satisfied;
- generates a medium access control protocol data unit (MAC PDU), which includes, when it is determined that the TAT is running, power headroom information for one or more serving cells included in the at least one TAG for which the MIR trigger condition is satisfied;
- and
- transmits, to a base station, the generated MAC PDU.
8 more elements
Dependencies are inferred from the claim text.