LTE UPLINK OPERATION FOR LTE IN AN UNLICENSED BAND

摘要

Systems, methods and means for uplink operation in LTE Unlicensed Spectrum (LTE-U) are disclosed. A wireless transmit/receive unit (WTRU) may receive, for example, license assisted access (LAA) configuration information for a first cell from a second cell. The first cell may relate to operation in an unlicensed band, and the second cell may relate to operation in a licensed band. The WTRU may determine whether the first subframe is a sounding reference signal (SRS) subframe for the first cell. If the first subframe is an SRS subframe for the first cell, the WTRU may determine an SRS resource for the first subframe and determine whether the WTRU is triggered to transmit an SRS transmission in the first subframe. When the WTRU is triggered to transmit the SRS transmission in the first subframe, the WTRU may transmit the SRS transmission on the SRS resource for the first subframe.