Method and device for uplink transmission by using unlicensed spectrum
First Claim
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1. A communication method, adapted to a communication device, for uplink transmission by using unlicensed spectrum, comprising:
- acquiring a transmission resource from the unlicensed spectrum based on a listen-before-talk (LBT) procedure;
sending an LBT success indicator to a base station after successfully acquiring the transmission resource from the unlicensed spectrum;
receiving an uplink resource grant from the base station; and
performing uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant,wherein the communication method further comprises;
after sending the LBT success indicator, sending a plurality of preamble signals to the base station, and obtaining a random access response (RAR) from the base station;
using a time advancement (TA) value in the RAR to adjust transmission timing of signals; and
based on the adjusted transmission timing of signals, performing the uplink data transmission with the base station on the unlicensed spectrum.
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Abstract
A method, adapted to a communication device, for uplink transmission by using unlicensed spectrum is provided. The method includes following steps. Acquiring transmission resource based on a listen-before-talk (LBT) procedure. Sending an LBT indicator to a base station after successfully acquiring the transmission resource. Receiving a uplink resource grant from the base station. Performing uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant.
24 Citations
24 Claims
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1. A communication method, adapted to a communication device, for uplink transmission by using unlicensed spectrum, comprising:
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acquiring a transmission resource from the unlicensed spectrum based on a listen-before-talk (LBT) procedure; sending an LBT success indicator to a base station after successfully acquiring the transmission resource from the unlicensed spectrum; receiving an uplink resource grant from the base station; and performing uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant, wherein the communication method further comprises; after sending the LBT success indicator, sending a plurality of preamble signals to the base station, and obtaining a random access response (RAR) from the base station; using a time advancement (TA) value in the RAR to adjust transmission timing of signals; and based on the adjusted transmission timing of signals, performing the uplink data transmission with the base station on the unlicensed spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication device, adapted to performing uplink transmission by using unlicensed spectrum, comprising:
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a transceiver; and a processing circuit, coupled to the transceiver and configured for; acquiring a transmission resource from the unlicensed spectrum based on a listen-before-talk (LBT) procedure; sending an LBT success indicator to a base station after successfully obtaining the transmission resource from the unlicensed spectrum; receiving an uplink resource grant from the base station; and controlling the transceiver to perform uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant, wherein after sending the LBT success indicator, the communication device controls the transceiver to send a plurality of preamble signals to the base station, obtains a random access response (RAR) from the base station, uses a time advancement (TA) value in the RAR to adjust transmission timing of signals, and based on the adjusted transmission timing of signals, controls the transceiver to perform the uplink data transmission with the base station on the unlicensed spectrum. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A communication method, adapted to a communication device, for uplink transmission by using unlicensed spectrum, comprising:
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acquiring a transmission resource from the unlicensed spectrum based on a listen-before-talk (LBT) procedure; sending an LBT success indicator to a base station after successfully acquiring the transmission resource from the unlicensed spectrum; receiving an uplink resource grant from the base station; and performing uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant, wherein the communication method further comprises; in response to a mute discontinuous reception (DRX) command, prohibiting the communication device from entering a sleep mode during a sleep period of a DRX cycle.
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24. A communication device, adapted to performing uplink transmission by using unlicensed spectrum, comprising:
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a transceiver; and a processing circuit, coupled to the transceiver and configured for; acquiring a transmission resource from the unlicensed spectrum based on a listen-before-talk (LBT) procedure; sending an LBT success indicator to a base station after successfully obtaining the transmission resource from the unlicensed spectrum; receiving an uplink resource grant from the base station; and controlling the transceiver to perform uplink data transmission with the base station on the unlicensed spectrum according to the uplink resource grant, wherein in response to a mute discontinuous reception (DRX) command, the processing circuit prohibits the communication device from entering a sleep mode during a sleep period of a DRX cycle.
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Specification