LRK Patent Law Firm
User equipment and method for transmitting message in multi-beam system
A method and user equipment for transmitting a message of a random access procedure in a multi-beam system includes: transmitting and retransmitting a message 1 of the RA procedure through a first beam of a plurality of transmission beams of the UE based on power ramping; and retransmitting, if one or more Msg. 2 (RAR) is not successfully received corresponding to the message 1 transmission/retransmission, the message 1 through a second beam of the plurality of transmission beams after switching the first beam to the second beam at a second power level which is the same as or higher than a first power level of the first beam.
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
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Hee Sang Gosan Junhyeong Il Gyu Sung Woo Bing
Chung Noh Kim Kim Choi Hui