Patent ID: 8442017
Filing Date: 2013-05-14
Classification: H04W

Abstract:
1. A method for responding to a random access channel message, the method comprising: receiving, at a base station, a first message including a random access channel (RACH) preamble from a user equipment; transmitting, at the base station, a second message including a RACH preamble response to the user equipment; receiving, at the base station after transmitting the second message including the RACH preamble response, a third message including a RACH message from the user equipment; reading, at the base station, channel quality measurement information of a downlink channel from a medium access control (MAC) layer header of the third message including the RACH message, wherein a channel quality of the downlink channel is measured by the user equipment, and wherein the channel quality measurement information is generated by the user equipment based on the measured channel quality and is included in the third message including the RACH message which is transmitted from the user equipment to the base station; determining, at the base station, a transmission power of a fourth message including a RACH message response which is transmitted from the base station to the user equipment, according to the channel quality measurement information; and transmitting, by the base station in response to the third message including the RACH message, the fourth message including the RACH message response according to the transmission power determined by the base station according to the channel quality measurement information included in the third message.