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

Claim 0:
1. A method of operation of a network node in a cellular communications network to provide Hybrid Automatic Repeat Request (HARQ) feedback for autonomous uplink transmissions in an unlicensed spectrum, the method comprising:
receiving a plurality of autonomous uplink transmissions from a wireless device in the unlicensed spectrum; and
transmitting 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.