Methods for PRACH in higher frequencies
AssigneeInterDigital Patent Holdings, Inc.
InventorsNazli Khan Beigi, Young Woo Kwak, Moon Il Lee, Paul Marinier, Patrick Tooher, Faris Alfarhan
Life of this patent
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Abstract
Methods and devices to extend the Channel Occupancy Time (COT) for LBT-free PRACH transmission across consecutive ROs based on blind detection are disclosed. Methods and devices to extend the COT for LBT-free PRACH transmission in case of one or more unused ROs across the consecutive ROs based on dynamic indication from gNB are disclosed. Methods and devices to determine the mode of operation based on the cover-codes are disclosed. Method and devices to support the PRACH transmission from a WTRU in multiple consecutive ROs are disclosed.
Claims16
A method in a wireless transmit/receive unit (WTRU) for physical random-access channel (PRACH) transmission, the method comprising
- receiving a configuration of PRACH information, the PRACH information including at least one candidate cover-code;
- performing listen before talk (LBT) in a first random-access channel (RACH) occasion (RO) that is prior to a second RO;
- on a condition that the LBT is not successful, detecting if there is a first PRACH preamble transmission in the first RO scrambled with a first cover-code from among the at least one candidate cover-code;
- and
- based on the detecting, transmitting a second PRACH preamble scrambled with a second cover-code from among the at least one candidate cover-code in the second RO.
A wireless transmit/receive unit (WTRU) comprising:
- a transceiver;
- and a processor operatively coupled to the transceiver,
- the processor and transceiver capable of operating to receive a configuration of PRACH information, the PRACH information including at least one candidate cover-code;
- the processor and transceiver capable of operating to perform listen before talk (LBT) in a first random-access channel (RACH) occasion (RO) that is prior to a second RO;
- on a condition that the LBT is not successful, the processor and transceiver capable of operating to detect if there is a first PRACH preamble transmission in the first RO scrambled with a first cover-code from among the at least one candidate cover-code;
- and
- based on the detecting, the processor and transceiver capable of operating to transmit a second PRACH preamble scrambled with a second cover-code from among the at least one candidate cover-code in the second RO.
Dependencies are inferred from the claim text.