US Patent No. 11,071,149

MULTEFIRE DESIGN OF RANDOM ACCESS CHANNEL AND RANDOM ACCESS CHANNEL PROCEDURE FOR INTERNET OF THINGS DEVICE OPERATION IN UNLICENSED SPECTRUM


Patent No. 11,071,149
Issue Date July 20, 2021
Title Multefire Design Of Random Access Channel And Random Access Channel Procedure For Internet Of Things Device Operation In Unlicensed Spectrum
Inventorship Huaning Niu, Milpitas, CA (US)
Wenting Chang, Beijing (CN)
Qiaoyang Ye, San Jose, CA (US)
Salvatore Talarico, Sunnyvale, CA (US)
Jinnian Zhang, Madison, WI (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 11,071,149


1. An apparatus of an enhanced Machine Type Communication (eMTC) user equipment (UE), the apparatus comprising:processing circuitry arranged to:decode control information from an evolved NodeB (eNB) on an anchor channel operating in an unlicensed band, the control information comprising a master information block (MIB) and System Information Broadcast Anchor (SIB-A-Mt) that provides a Random Access Channel (RACH) resource configuration for a RACH procedure and a dwell time for data channels in the unlicensed band;
wherein a hopping sequence of the data channels is derived from an identifier of the eNB or received in the control information;
determine, from the RACH resource configuration, RACH resources of at least one of the anchor channel or data channels on which to transmit uplink (UL) RACH messages and on which to monitor for downlink (DL) RACH messages of the RACH procedure; and
encode the UL RACH messages for transmission to the eNB and decode the DL RACH messages received from the eNB on the RACH resources as part of the RACH procedure; and

a memory configured to store the RACH resource configuration for the eMTC UE.