Patent ID: 11950280
Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method comprising:
determining that a channel is available in multiple frequency bands;
generating a composite carrier indicator (CCI) that indicates one or more of the frequency bands of the multiple frequency bands that are within the composite carrier;
sending the CCI to a wireless transmit/receive unit (WTRU), wherein the CCI is communicated via downlink control information of a physical downlink control channel (PDCCH) transmission;
determining that a category four (CAT4) listen-before talk (LBT) is successful on a first frequency band of the one or more frequency bands; and
based on the CAT4 LBT being successful on the first frequency band of the one or more frequency bands, performing a category two (CAT2) LBT on a second frequency band, wherein the first frequency band and the second frequency band are in the composite carrier.