US 11,388,728 B2 · Channel availability protocol in a shared spectrum

Abstract

Methods, systems, and devices for wireless communications are described. A transmitter may identify a contention window for a no-energy-detection protocol for determining a channel availability for a data transmission. After the contention window expires, the transmitter may send a request message to a receiver. The receiver may measure a quality of the request message against a request threshold and transmit a response message if the measured quality exceeds the request threshold. The transmitter may then measure a quality of the response message against a response threshold. If the measured quality exceeds the response threshold, the transmitter may initiate a data transmission with the receiver. If the quality falls below the response threshold or the response message is not received, the transmitter may adjust the contention window and reattempt the no-energy-detection protocol. The contention window may also be adjusted based on an acknowledgement message received after the data transmission.

Claims23

Dependent claims

A method for wireless communication at a transmitter, comprising:

identifying a contention window comprising a first set of time-frequency resources;
transmitting, to a receiver after the contention window expires, a request message to request initiation of a data transmission, the request message comprising an indication of a time of transmission from the receiver for a response message, a request threshold associated with the request message, and an indication of a response threshold;
receiving the response message from the receiver in response to the request message based at least in part on the time for receiving the response message and the request threshold;
measuring a signal to noise quality metric associated with the response message;
and
initiating the data transmission in a shared frequency spectrum band based at least in part on whether the signal to noise quality metric measurement associated with the response message exceeds the response threshold.

3 more elements

An apparatus for wireless communication, comprising:

a processor;
memory in electronic communication with the processor;
and
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify a contention window comprising a first set of time-frequency resources;
transmit, to a receiver after the contention window expires, a request message to request initiation of a data transmission, the request message comprising an indication of a time of transmission from the receiver for a response message, a request threshold associated with the request message, and an indication of a response threshold;
receive the response message from the receiver in response to the request message based at least in part on the time for receiving the response message and the request threshold;
measure a signal to noise quality metric associated with the response message;
and
initiate the data transmission in a shared frequency spectrum band based at least in part on whether the signal to noise quality metric measurement associated with the response message exceeds the response threshold.

7 more elements

Dependencies are inferred from the claim text.

Channel availability protocol in a shared spectrum

Life of this patent

Channel availability protocol in a shared spectrum

Life of this patent

Abstract

Claims23