Holland & Hart LLP
Listen-before-talk for LTE direct on unlicensed radio frequency spectrum band
Methods, systems, and devices are described for direct device-to-device (D2D) communications in a subframe on a channel in an unlicensed radio frequency spectrum band. A user equipment (UE) may perform a listen-before-talk (LBT) procedure on the channel in the unlicensed radio frequency spectrum band. The UE may identify a time period between a completion of the LBT procedure and a boundary of a second subframe. The UE may transmit a Wi-Fi preamble and a variable length message on the channel during the identified timer period. The variable length message may include a duration that is time aligned with the boundary of the second subframe.
H H H H H H H
H04W H04L H04W H04W H04W H04W H04W
inventional inventional additional inventional additional inventional inventional
Santosh Paul Saurabha Rangrao Junyi Jay Rodney
Abraham Tavildar Li Walton