Patent ID: 11929833
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A network node for a cellular communications network enabled to provide HARQ feedback for autonomous uplink transmissions in an unlicensed spectrum, the network node comprising:
at least one processor, memory and transceiver collectively configured to:
receive a plurality of autonomous uplink transmissions from a wireless device in the unlicensed spectrum; and
transmit HARQ feedback for the plurality of autonomous uplink transmissions to the wireless device, the HARQ feedback comprising a bit map of a set of all HARQ processes configured for at least one cell and a corresponding bit acknowledgement mapped to each configured HARQ process, wherein the transmitting the HARQ feedback comprises:
transmitting the HARQ feedback using a shared maximum channel occupancy time scheme in which a portion of a maximum channel occupancy time for an uplink transmission from the wireless device is used for transmission by the network node; and
transmitting the HARQ feedback starting at an earliest subframe boundary within the shared maximum channel occupancy time after completion of the uplink transmission and performing a fast Listen Before Talk (LBT) procedure.