Patent ID: 11963223
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 21:
22. A device for performing or providing random access (RA) to a radio access network (RAN) using an unlicensed channel, the device comprising:
memory; and
processing circuitry coupled to the memory, wherein the device is configured to:
perform a first listen-before-talk (LBT) operation on the unlicensed channel, the first LBT operation indicating the channel being occupied at a beginning of a RA occasion for transmitting a RA preamble signal;
perform a second LBT operation on the unlicensed channel, the second LBT operation indicating the channel being idle within a part of the RA occasion for transmitting the RA preamble signal; and
transmit the RA preamble signal in response to the second LBT operation, wherein the transmitted RA preamble signal comprises a partial RA preamble transmitted in the idle part of the RA occasion, wherein the RA preamble signal comprises orthogonal frequency division multiplexing (OFDM) symbols, and wherein the partial RA preamble comprises a subset of the OFDM symbols configured in the RAN for a complete RA preamble.