Patent ID: 9479304
Filing Date: 2016-10-25
CPC Classification: H04L

Claim Text:
1. A method of transmitting an uplink reference signal in a wireless access system, the method performed by a mobile station and comprising: comparing a detected mobility speed of the mobile station with a threshold value to obtain a comparison result; generating a beacon reference signal using a demodulation reference signal used in a physical uplink shared channel (PUSCH) region, when the comparison result indicates that the detected mobility speed of the mobile station is equal to or greater than the threshold value; inserting the generated beacon reference signal, instead of a sounding reference signal (SRS), into a last symbol of a subframe in an uplink frequency domain in which the PUSCH is transmitted; and transmitting the inserted beacon reference signal to a base station via a same subframe as the demodulation reference signal, wherein the beacon reference signal is used for an uplink channel estimation of the PUSCH by the base station, together with the demodulation reference signal.