Method for transmitting uplink in unlicensed band and device using same
AssigneeLG Electronics Inc.
InventorsJoonkui Ahn, Suckchel Yang, Hanbyul Seo, Yunjung Yi, Seonwook Kim
Life of this patent
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Abstract
Provided are a method for transmitting uplink in an unlicensed band and a device using the same. The device performs a clear channel assessment (CCA) inside a transmission window in an unlicensed band to thereby confirm whether a channel is idle. When the channel is idle, the device transmits an uplink transmission block inside the transmission window in the unlicensed band.
Claims7
A method for transmitting an uplink transport block in a wireless communication system, the method comprising:
- receiving, by a wireless device from a base station, an uplink grant scheduling at least one first subframe and at least one second subframe for transmitting an uplink transport block,
- wherein the uplink grant scheduling includes scheduling a transmission of the uplink transport block during the at least one first subframe and the at least one second subframe;
- performing, by the wireless device, a clear channel assessment (CCA) within a transmission window in an unlicensed band to determine whether a channel is idle or busy during the transmission window;
- when the CCA determines that the channel is busy during the transmission window, dropping the scheduled transmission of the uplink transport block in the at least one first subframe and the at least one second subframe;
- and
- when the CCA determines that the channel is idle, performing the scheduled transmission, by the wireless device, of the uplink transport block to the base station in the at least one first subframe within the transmission window in the unlicensed band,
- wherein the performing the scheduled transmission includes:
- determining whether the at least one first subframe and the at least second subframe are within a transmission window, and
- suspending the scheduled transmission of the uplink transport block in the at least one second subframe when the at least one second subframe is beyond the transmission window.
A device for transmitting an uplink transport block in a wireless communication system, the device comprising:
- a transceiver that transmits and receives a radio signal;
- and
- a processor operatively coupled to the transceiver and configured to:
- receive an uplink grant scheduling at least one first subframe and at least one second subframe for transmitting an uplink transport block through the transceiver,
- wherein the uplink grant scheduling includes scheduling a transmission of the uplink transport block during the at least one first subframe and the at least one second subframe;
- perform a clear channel assessment (CCA) through the transceiver within a transmission window in an unlicensed band to determine whether a channel is idle or busy during the transmission window;
- when the CCA determines that the channel is busy during the transmission window, drop the scheduled transmission of the uplink transport block in the at least one first subframe and the at least one second subframe;
- and
- when the CCA determines that the channel is idle, performing the scheduled transmission of the uplink transport block to the base station through the transceiver in the at least first subframe within the transmission window in the unlicensed band,
- wherein the performing the scheduled transmission includes:
- determining whether the at least one first subframe and the at least second subframe are within a transmission window, and
- suspending the scheduled transmission of the uplink transport block in the at least one second subframe when the at least one second subframe is beyond the transmission window.
Dependencies are inferred from the claim text.