LISTEN BEFORE TALK FOR CELLULAR IN UNLICENSED BAND

摘要

Disclosed in some examples are systems, machine-readable media, methods, and cellular wireless devices which implement a Listen Before Talk (LBT) access scheme for a device operating according to a cellular wireless protocol in an unlicensed channel. A cellular wireless device may utilize the cellular wireless protocol in the unlicensed channel after the LBT access scheme has determined that a channel (a defined range of frequencies) in the unlicensed channel is idle for a particular period of time.

主权项

1. An eNodeB comprising:
a first transceiver to transmit and receive in an unlicensed channel using a first wireless protocol; a second transceiver to transmit and receive in a licensed channel in accordance with a cellular wireless protocol; a controller to: determine, via the first transceiver, that an average energy of the unlicensed channel over a predetermined period of time is below a predetermined threshold, and in response: send a wireless reservation message on the unlicensed channel via the first transceiver to reserve the unlicensed channel for a transmission of a Supplemental Downlink (SDL) Physical Downlink Shared Channel (PDSCH); schedule at least one User Equipment (UE) serviced by the eNodeB to receive data on the SDL PDSCH in the unlicensed channel via a Physical Downlink Control Channel (PDCCH) on the licensed channel transmitted by the second transceiver; and transmit the SDL PDSCH over the unlicensed channel at a cellular sub-frame boundary via the first transceiver.