Patent ID: 7953018

Claim:
A method of transmitting a data packet based on a transmission power using hybrid automatic repeat request (HARQ), the method comprising: receiving first uplink scheduling information including a first range of transmission power from a base station (BS) for initial transmission of an uplink enhanced dedicated channel (E-DCH) data packet; transmitting the uplink E-DCH data packet using a first transmission power determined from the first range of transmission power and a first transport format combination (TFC), wherein the first TFC is selected to correspond to the first transmission power; receiving a negative acknowledgment (NACK) signal from the BS; and retransmitting the uplink E-DCH data packet using either a second transmission power and a second TFC selected to correspond to the second transmission power or the first transmission power and the first TFC, wherein the uplink E-DCH data packet is transmitted using the second transmission power and the second TFC selected to correspond to the second transmission power only if second uplink scheduling information including a second range of transmission power is received from the BS for retransmission of the uplink E-DCH data packet, wherein the uplink E-DCH data packet is transmitted using the first transmission power and the first TFC only if the second uplink scheduling information is not received from the BS, wherein the second transmission power is determined as a maximum transmission power from the second range of transmission power using a transmit power ratio for retransmitting the uplink E-DCH data packet, and wherein the second uplink scheduling information is received only when the first transmission power for transmitting the uplink E-DCH data packet must be changed.