1. A method performed by a first communication device, the first communication device operating in a wireless communications network, the method comprising:receiving an uplink assignment from a second communication device operating in the wireless communications network;
determining, based on the uplink assignment, one or more parameters for transmitting on an extended physical uplink control channel (ePUCCH) in an unlicensed band to the second communication device, the one or more parameters comprising an indication of a listen-before-talk (LBT) scheme for the ePUCCH, wherein said determining is based on a time of transmission on the ePUCCH;
performing LBT according to the indicated LBT scheme for the ePUCCH; and
transmitting on the ePUCCH to the second communication device as a consequence of the LBT;wherein the determining the one or more parameters comprises the first communication device autonomously determining the one or more parameters, and wherein the determining comprises determining LBT parameters based on an estimation of a transmission opportunity (TXOP) by the first communication device.