Subframe aligned listen-before-talk for cellular in unlicensed band
AssigneeIntel IP Corporation
InventorsAbhijeet Bhorkar, Hwan-Joon Kwon, Christian Ibars Casas
Life of this patent
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Abstract
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.
Claims21
A hardware device comprising:
- a memory, and
- processing circuitry configured to:
- configure transceiver circuitry of an eNodeB to sense a first channel on an unlicensed spectrum for a first predetermined duration;
- responsive to a determination that the first channel is idle, set a value to a random number between zero and a maximum value;
- while the value is greater than zero, repeatedly:
- sense the first channel for a second predetermined duration;
- decrement the value when the first channel is sensed as idle;
- and
- sense the first channel for the first predetermined duration when the first channel is sensed as busy;
- and
- configure the transceiver circuitry to transmit data over the first channel when the value becomes equal to zero.
A method of controlling an eNodeB, the method comprising:
- configuring, using controller circuitry of the eNodeB, transceiver circuitry of the eNodeB to sense a first channel on an unlicensed spectrum for a first predetermined duration;
- responsive to a determination that the first channel is idle, setting, by the controller circuitry, a value to a random number between zero and a maximum value;
- determining, by the controller circuitry, that the value is greater than zero and, while the value is greater than zero, repeatedly:
- sensing the first channel the a second predetermined duration;
- decrementing the value when the first channel is sensed as idle, and
- sensing the first channel for the first predetermined duration when the first channel is sensed as busy:
- and
- configuring, by the controller circuitry, the transceiver circuitry to transmit data over the first channel when the value becomes equal to zero.
A non-transitory machine readable medium, storing instructions, which when performed by circuitry of an eNodeB cause the circuitry to perform operations comprising:
- configuring, using controller circuitry of the eNodeB, transceiver circuitry of the eNodeB to sense a first channel on an unlicensed spectrum for a first predetermined duration;
- responsive to a determination that the first channel is idle, setting, by the controller circuitry, a value to a random number between zero and a maximum value;
- determining, by the controller circuitry, that the value is greater than zero and, while the value is greater than zero, repeatedly:
- sensing the first channel for a second predetermined duration;
- decrementing the value when the first channel is sensed as idle;
- and
- sensing the first channel for the first predetermined duration when the first channel is sensed as busy;
- and
- configuring, by the controller circuitry, the transceiver circuitry to transmit data over the first channel when the value becomes equal to zero.
Dependencies are inferred from the claim text.