Patent ID: 9450661
Filing Date: 2016-09-20
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method for tracking a beam by a terminal in a wireless communication system, the method comprising: receiving, by the terminal, a plurality of downlink (DL) reference signals through a plurality of different DL reception (Rx) beams, from a base station, wherein the plurality of DL reference signals are transmitted through a plurality of different DL transmission (Tx) beams at the base station, determining at least one DL Tx/Rx beam index pairs based on the plurality of downlink reference signals; and transmitting, to the base station, a plurality of uplink (UL) reference signals through a plurality of different UL Tx beams, each of the plurality of UL reference signals including a first information corresponding to the DL Tx beam index of the determined at least one DL Tx/Rx beam index pairs.