CPC H04W 72/21 (2023.01) [H04B 17/382 (2015.01); H04W 16/14 (2013.01); H04W 24/02 (2013.01); H04W 28/0278 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01); H04W 74/0808 (2013.01); H04B 17/345 (2015.01)] | 15 Claims |
1. A user equipment for performing channel detection on a plurality of carriers in an unlicensed frequency band for uplink transmissions, the user equipment comprising:
a processing circuit, wherein
the plurality of carriers comprises a first carrier and a second carrier, and
the processing circuit is configured to:
perform channel detection selected from a group consisting of a first type of the channel detection and a second type of the channel detection that is different from the first type of the channel detection, wherein a type of the channel detection performed on the first carrier is different from the type of the channel detection performed on the second carrier;
perform the first type of the channel detection on the first carrier to confirm whether the first carrier is available; and
under a condition that the second type of the channel detection is performed on the second carrier immediately before transmission on the first carrier, perform the second type of the channel detection on the second carrier to confirm whether the second carrier is available.
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