Method for facilitating clear channel assessment and radio unit
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMing Li, Yanqiang Li, Jinhua Liu
Life of this patent
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Abstract
The present disclosure provides a method (300) in a Radio Unit (RU) for facilitating Clear Channel Assessment (CCA). The method (300) comprises: detecting (S310), in a first transmission period while the RU is operating in a first channel, whether one or more candidate channels in proximity to the first channel are unoccupied; determining (S320), when the first channel is not clear for transmission in a second transmission period, whether any of the one or more candidate channels that is detected to be unoccupied is clear for transmission in the second transmission period; and selecting (S330) one of the one or more candidate channels that is determined to be clear, for transmission in the second transmission period.
Claims11
A method in a Radio Unit (RU) for facilitating Clear Channel Assessment (CCA), comprising:
- detecting, in a first transmission period while the RU is operating in a first channel, whether one or more candidate channels in proximity to the first channel are unoccupied;
- applying a transmitter shutdown to a transmitter in the RU during one or more predetermined symbols in the first transmission period;
- determining, in response to a determination that the first channel is not clear for transmission in a second transmission period, whether any of the one or more candidate channels detected to be unoccupied are clear for transmission in the second transmission period;
- sensing whether an energy level received in each of the one or more candidate channel during the one or more predetermined symbols is lower than a predetermined threshold and, if so, deeming the candidate channel to be unoccupied;
- and
- selecting one of the candidate channels determined to be clear, for transmission in the second transmission period.
A Radio Unit (RU) configured for facilitating Clear Channel Assessment (CCA), comprising:
- a transceiver;
- a processor;
- and
- a memory, the memory containing instructions executable by the processor whereby the RU is operative to:
- detect, in a first transmission period while the RU is operating in a first channel, whether one or more candidate channels in proximity to the first channel are unoccupied;
- apply a transmitter shutdown to a transmitter in the RU during one or more predetermined symbols in the first transmission period;
- determine, in response to a determination that the first channel is not clear for transmission in a second transmission period, whether any of the one or more candidate channels detected to be unoccupied are clear for transmission in the second transmission period;
- sense whether an energy level received in each of the one or more candidate channel during the one or more predetermined symbols is lower than a predetermined threshold and, if so, deeming the candidate channel to be unoccupied;
- and
- select one of the candidate channels determined to be clear, for transmission in the second transmission period.
Dependencies are inferred from the claim text.