US Patent No. 10,368,270

METHOD AND APPARATUS FOR ACCESSING A RANDOM ACCESS CHANNEL BY SELECTIVELY USING DEDICATED OR CONTENTION-BASED PREAMBLES DURING HANDOVER


Patent No. 10,368,270
Issue Date July 30, 2019
Title Method And Apparatus For Accessing A Random Access Channel By Selectively Using Dedicated Or Contention-based Preambles During Handover
Inventorship Guodong Zhang, Woodbury, NY (US)
Jin Wang, Princeton, NJ (US)
Assignee InterDigital Patent Holdings, Inc., Wilmington, DE (US)

Claim of US Patent No. 10,368,270

1. A wireless transmit/receive unit (WTRU) comprising:a transmitter; and
a processor configured to:
activate a timer;
transmit, via the transmitter, a dedicated non-contention based random access channel (RACH) preamble to attempt RACH access prior to an expiration of the timer; and
transmit, via the transmitter, a contention-based RACH preamble after the RACH access attempt fails using the dedicated non-contention based RACH preamble and after the expiration of the timer.