Registered TRANSMISSION METHOD OF MOBILE STATION FOR RANDOM ACCESS CHANNEL DIVERSITY

Inventors

Yi Hyoseok, Kim Il Gyu, Ko Young Jo, Chang Kapseok, Young-Hoon Kim, Bang Seung Chan, Park Hyeong Geun

Application No.

12297745 (2007.04.19)

Publication No.

20090175161 (2009.07.09)

Registration No.

8165097 (2012.04.24)

Country

UNITED STATES

Abstract

A transmission method performed by a mobile station for random access channel (RACH) burst transmission diversity gain is provided. According to the method, by combining and using switching diversity by beam forming, frequency hopping, and power ramping, the probability that when the speed of a mobile station is low, the mobile station falls into a deep fading environment is lowered, thereby increasing the probability of detecting an RACH signature of the base station. Also, by using the transmission parameters (subbands, precoding matrixes, power, etc.) which are used for successful transmission of an RACH burst, for transmission of a successive user packet data, reliable transmission of the successive user packet data can be performed.

KSP Keywords

Deep fading, Diversity gain, Mobile station(MS), Random Access Channel(RACH), Reliable transmission, base station, beam forming, burst transmission, channel diversity, fading environments, frequency hopping(FH), packet data, random access, transmission method, transmission parameters

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Status	Patent	Country	KIPRIS
Registered	TRANSMISSION METHOD OF MOBILE STATION FOR RANDOM ACCESS CHANNEL DIVERSITY	GERMANY