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

Claim 10:
11. A method of operation of a wireless device in a cellular communications network enabled to transmit autonomous uplink transmissions in an unlicensed spectrum, the method comprising:
performing autonomous uplink transmissions in the unlicensed spectrum for one or more HARQ processes;
receiving, from a network node, HARQ feedback comprising a bit map of a set of HARQ processes configured for at least one cell and a corresponding bit acknowledgement mapped to each configured HARQ process;
in response to determining that no HARQ feedback for a predetermined autonomous uplink transmission is received from the network node within a predetermined time period, retransmitting the predetermined autonomous uplink transmission;
using a timer to determine a number of subframes since an initial transmission of the predetermined autonomous uplink transmission; and
performing retransmission in response to the timer exceeding a configured threshold.