Fallback procedures for two-step random access procedures

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United States of America Patent

PATENT NO 12114356
APP PUB NO 20230371071A1
SERIAL NO

18356203

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Abstract

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Fallback procedures for user equipments (UEs) are described that provide efficient fallback to a four-step random access procedure from a two-step random access procedure. For example, after transmitting a first message of a two-step random access procedure, a UE may start a fallback timer or counter and monitor for a second message of the two-step random access procedure for the duration of the fallback timer or counter. At the expiration of the fallback timer or counter, the UE may fall back to a four-step random access procedure. In some cases, the UE may transmit multiple repetitions of the first message and monitor for responses after transmitting the repetitions or after each repetition. Additionally, or alternatively, the base station may transmit an explicit signal to the UE that may signal to the UE to perform a fallback procedure at a beginning or middle of a random access procedure.

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Patent Owner(s)

Patent OwnerAddress
QUALCOMM INCORPORATED5775 MOREHOUSE DRIVE SAN DIEGO CA 92121-1714

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bhushan, Naga San Diego, US 738 17353
Chen, Wanshi San Diego, US 2748 35847
He, Linhai San Diego, US 560 1509
Lei, Jing San Diego, US 492 2194
Ly, Hung Dinh San Diego, US 645 1057
Park, Seyong San Diego, US 214 1133
Soriaga, Joseph Binamira San Diego, US 658 6163
Wang, Ying San Diego, US 968 7243

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