Electronic device and wireless communication method in wireless communication system

An electronic device in a wireless communication system, comprising:

• one or more processing circuits configured to perform operations of:
• acquiring downlink signaling from a base station in the wireless communication system;
• extracting, from the downlink signaling, timing mapping information between a downlink subframe carrying uplink grant signaling and an uplink subframe carrying uplink transmission comprising Physical Uplink Shared Channel (PUSCH) transmission performed on an unlicensed channel scheduled by the uplink grant signaling;
• extracting, from the downlink signaling, configuration information on a channel detection type of a channel detection process to be performed before uplink transmission comprising PUSCH transmission on the unlicensed channel;
• extracting, from the downlink signaling, information on which one of a plurality of unlicensed carriers on the unlicensed channel is a primary channel, and which of the unlicensed carriers are secondary channels;
• configuring the channel detection type for the secondary channels to be a first channel detection process;
• and
• for the primary channel,
• configuring the channel detection type to be a first channel detection process when the uplink subframe carrying uplink transmission comprising the PUSCH transmission falls within Maximum Channel Occupancy Time (MCOT) after channel detection of a base station side in the wireless communication system is successful;
• and
• configuring the channel detection type to be a second channel detection process when the uplink subframe carrying the PUSCH transmission falls beyond the MCOT, wherein a contention window size (CWS) associated with the second channel detection process is adjusted based on a success rate of one or more PUSCH transmissions occurring in one or more prior subframes.

A method for performing wireless communication in a wireless communication system, comprising:

• configuring timing mapping information between a downlink subframe carrying uplink grant signaling and an uplink subframe carrying uplink transmission comprising Physical Uplink Shared Channel (PUSCH) transmission performed on an unlicensed channel by a user equipment in the wireless communication system scheduled by the uplink grant signaling;
• notifying the user equipment of the timing mapping information;
• generating configuration information on a channel detection type of a channel detection process performed by the user equipment before uplink transmission comprising PUSCH transmission on the unlicensed channel;
• setting one of a plurality of unlicensed carriers on the unlicensed channel to be a primary channel, and setting the other unlicensed carriers to be secondary channels;
• configuring the channel detection type for the secondary channels to be a first channel detection process;
• and
• for the primary channel,
• configuring the channel detection type to be a first channel detection process when the uplink subframe carrying uplink transmission comprising the PUSCH transmission falls within Maximum Channel Occupancy Time (MCOT) after channel detection of a base station side in the wireless communication system is successful;
• and
• configuring the channel detection type to be a second channel detection process when the uplink subframe carrying the PUSCH transmission falls beyond the MCOT, wherein a contention window size (CWS) associated with the second channel detection process is adjusted based on a success rate of one or more PUSCH transmissions occurring in one or more prior subframes.

A method for performing wireless communication in a wireless communication system, comprising:

• acquiring downlink signaling from a base station in the wireless communication system;
• extracting, from the downlink signaling, timing mapping information between a downlink subframe carrying uplink grant signaling and an uplink subframe carrying uplink transmission comprising Physical Uplink Shared Channel (PUSCH) transmission performed on an unlicensed channel scheduled by the uplink grant signaling;
• extracting, from the downlink signaling, information on a channel detection type of a channel detection process to be performed by the one or more processing circuits before uplink transmission comprising PUSCH transmission on the unlicensed channel;
• extracting, from the downlink signaling, information on which one of a plurality of unlicensed carriers on the unlicensed channel is a primary channel, and which of the unlicensed carriers are secondary channels;
• configuring the channel detection type for the secondary channels to be a first channel detection process;
• and
• for the primary channel,
• configuring the channel detection type to be a first channel detection process when the uplink subframe carrying uplink transmission comprising the PUSCH transmission falls within Maximum Channel Occupancy Time (MCOT) after channel detection of a base station side in the wireless communication system is successful;
• and
• configuring the channel detection type to be a second channel detection process when the uplink subframe carrying the PUSCH transmission falls beyond the MCOT, wherein a contention window size (CWS) associated with the second channel detection process is adjusted based on a success rate of one or more PUSCH transmissions occurring in one or more prior subframes.