Method and device for reporting power headroom in mobile communication system for carrier aggregation
AssigneeSamsung Electronics Co., Ltd.
InventorsSoeng Hun Kim, Kyeong In Jeong, Sang Bum Kim, Han Na Lim, Jae Hyuk Jang
Life of this patent
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Abstract
Provided are a method and apparatus for reporting power headroom in a mobile communication system supporting carrier aggregation. A user equipment (UE) determines the maximum transmit power for each carrier and the maximum UE transmit power, and sends a power headroom report that contains power headroom for each carrier computed based on the maximum transmit power for the carrier and the maximum UE transmit power to a corresponding base station (ENB).
Claims20
A method of reporting power headroom for a user equipment (UE) in a mobile communication system supporting multiple aggregated carriers, the method comprising:
- receiving configuration information for multiple carriers to be aggregated and power headroom reporting from a base station (ENB);
- determining, upon reception of resource allocation for uplink transmission to the ENB, the maximum transmit power for each carrier and the maximum UE transmit power;
- and
- sending a power headroom report that contains power headroom for each carrier computed based on the maximum transmit power for the carrier and the maximum UE transmit power to the ENB.
A method of receiving a power headroom report from a user equipment (UE) in a mobile communication system supporting multiple aggregated carriers, the method comprising:
- sending configuration information for multiple carriers to be aggregated and power headroom reporting to the UE;
- sending resource allocation information for uplink transmission to the UE;
- receiving a power headroom report that contains power headroom for each carrier computed based on the maximum transmit power for the carrier and the maximum UE transmit power from the UE;
- and
- performing uplink scheduling for the UE on the basis of the power headroom report.
An apparatus for reporting power headroom in a user equipment (UE) in a mobile communication system supporting multiple aggregated carriers, the apparatus comprising:
- a transceiver unit to send and receive signals to and from a base station (ENB) through multiple carriers;
- and
- a control unit to control a process of receiving configuration information for multiple carriers to be aggregated and power headroom reporting from the ENB, determining, upon reception of resource allocation for uplink transmission to the ENB, the maximum transmit power for each carrier and the maximum UE transmit power, and sending a power headroom report that contains power headroom for each carrier computed based on the maximum transmit power for the carrier and the maximum UE transmit power to the ENB.
An apparatus for receiving a power headroom report from a user equipment (UE) in a mobile communication system supporting multiple aggregated carriers, the apparatus comprising:
- a transceiver unit to send and receive signals to and from the UE through multiple carriers;
- and
- a control unit to perform a process of sending configuration information for multiple carriers to be aggregated and power headroom reporting to the UE, sending resource allocation information for uplink transmission to the UE, receiving a power headroom report that contains power headroom for each carrier computed based on the maximum transmit power for the carrier and the maximum UE transmit power from the UE, and performing uplink scheduling for the UE on the basis of the power headroom report.
Dependencies are inferred from the claim text.