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US 12,010,721 B2Granted
Initial signal detection method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsJi Wu, Jiayin Zhang, Qiong Jia
Life of this patent
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Abstract
An initial signal detection method includes performing, by a user equipment, detection on one or more sub-channels on an unlicensed spectrum, and determining, based on a combination of a group common-demodulation reference signal and a group common-physical downlink control channel that is detected by the user equipment a first time, that downlink transmission has started or that a channel occupancy time has started.
Claims19
An initial signal detection method, comprising:
- performing, by a user equipment (UE), detection on one or more sub-channels on an unlicensed spectrum;
- and
- determining, based on a combination of a group common-demodulation reference signal (GC-DMRS) and a GC-physical downlink control channel (GC-PDCCH) that is detected by the UE a first time that downlink transmission has started or that a channel occupancy time (COT) has started.
An initial signal transmission method, comprising:
- performing, by a network side, listen before talk (LBT) on one or more sub-channels on an unlicensed spectrum;
- and
- sending, by the network side, one or more combinations of a group common-demodulation reference signal (GC-DMRS) and a GC-physical downlink control channel (GC-PDCCH) on one or more sub-channels on which the LBT succeeds, wherein one of the one or more combinations of the GC-DMRS and the GC-PDCCH is used as an initial signal for downlink transmission.
A communication apparatus, comprising:
- a non-transitory memory configured to store non-transitory instructions;
- and
- one or more processors coupled with the non-transitory memory, wherein the one or more processors are configured to execute the non-transitory instructions to cause the apparatus to:
- perform detection on one or more sub-channels on an unlicensed spectrum;
- and
- determine, based on a combination of a group common-demodulation reference signal GC-DMRS) and a GC-physical downlink control channel (GC-PDCCH) that is detected for a first time, that downlink transmission has started or that a channel occupancy time (COT) has started.
3 more elements
Dependencies are inferred from the claim text.