US 12,439,266 B2
Wireless communication method for unlicensed frequency spectrum, and communication device
Zuomin Wu, Beijing (CN); and Chuanfeng He, Beijing (CN)
Assigned to BEIJING OPPO TELECOMMUNICATIONS CORP., LTD., Beijing (CN)
Filed by BEIJING OPPO TELECOMMUNICATIONS CORP., LTD., Beijing (CN)
Filed on Sep. 29, 2021, as Appl. No. 17/488,704.
Application 17/488,704 is a continuation of application No. PCT/CN2019/080550, filed on Mar. 29, 2019.
Prior Publication US 2022/0022051 A1, Jan. 20, 2022
Int. Cl. H04W 16/14 (2009.01); H04W 74/0808 (2024.01)
CPC H04W 16/14 (2013.01) [H04W 74/0808 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wireless communication method for an unlicensed frequency spectrum, comprising:
transmitting, by a first device, first information to a second device on a first transmission burst within first Channel Occupancy Time (COT),
wherein a channel access scheme corresponding to the first transmission burst is determined based on a second transmission burst, the second transmission burst is a last transmission burst before the first transmission burst within the first COT, and the first COT is COT obtained by the first device or COT obtained by the second device;
the first transmission burst is an N-th transmission burst within the first COT, and the second transmission burst is an (N−1)-th transmission burst within the first COT, N being a positive integer greater than 2, and the channel access scheme corresponding to the first transmission burst is determined based on a first case or a second case;
the first case comprises at least one of:
when a channel access scheme corresponding to at least one transmission burst from the 2nd transmission burst to the (N−1)-th transmission burst within the first COT is a second channel access scheme, the channel access scheme corresponding to the first transmission burst being the second channel access scheme;
when each of channel access schemes corresponding to the 2nd transmission burst to the (N−1)-th transmission burst within the first COT is a first channel access scheme, and a first time duration is smaller than or equal to a first threshold, the channel access scheme corresponding to the first transmission burst being the first channel access scheme; or
when each of the channel access schemes corresponding to the 2nd transmission burst to the (N−1)-th transmission burst within the first COT is the first channel access scheme, and the first time duration is greater than the first threshold, the channel access scheme corresponding to the first transmission burst being the second channel access scheme;
the second case comprises at least one of:
when a channel access scheme corresponding to the second transmission burst is the second channel access scheme, the channel access scheme corresponding to the first transmission burst being the second channel access scheme;
when the first device receives second information on the second transmission burst before transmitting on the first transmission burst, and a first time duration is smaller than or equal to a first threshold, the channel access scheme corresponding to the first transmission burst being a first channel access scheme;
when the first device receives the second information on the second transmission burst before transmitting on the first transmission burst, and the first time duration is greater than the first threshold, the channel access scheme corresponding to the first transmission burst being the second channel access scheme; or
when the first device does not receive the second information on the second transmission burst before transmitting on the first transmission burst, the channel access scheme corresponding to the first transmission burst being the second channel access scheme;
wherein the first time duration is a time duration between end time of the second transmission burst and start time of the first transmission burst;
wherein in the first channel access scheme, no channel sensing is required before transmitting on a transmission burst;
wherein in the second channel access scheme, one-slot channel sensing is required before transmitting on a transmission burst.