US 12,452,922 B2
Special dual CTS mode for improvement in collision avoidance
Tsung-Hsuan Wu, Hsinchu (TW); Chao-Wen Chou, Hsinchu (TW); Ching-Yu Kuo, Hsinchu (TW); Ping Hsien Chiang, Hsinchu (TW); and Ming-Yen Tsai, Hsinchu (TW)
Assigned to MediaTek Inc., (TW)
Filed by MediaTek Inc., Hsinchu (TW)
Filed on Nov. 14, 2022, as Appl. No. 17/986,734.
Claims priority of provisional application 63/297,254, filed on Jan. 7, 2022.
Prior Publication US 2023/0224963 A1, Jul. 13, 2023
Int. Cl. H04W 74/0816 (2024.01)
CPC H04W 74/0816 (2013.01) 6 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting, by a first station (STA), a request-to-send (RTS);
receiving, by the first STA, a first clear-to-send (CTS) from a second STA responsive to transmitting the RTS, the first CTS being of either a first type or a second type different from the first type as the second STA switches between a dual CTS sequence and a normal CTS sequence without a need to negotiate with the first STA to avoid collision of transmissions by the second STA and one or more other STAs;
performing, by the first STA, either of:
waiting, by the first STA, to receive a second CTS and receiving the second CTS from the second STA or a third STA before transmitting data to the second STA upon passage of a waiting period after receiving the second CTS responsive to the dual CTS sequence being chosen by the second STA with the first CTS being of the first type and the second CTS being of the second type; or
waiting, by the first STA, for passage of the waiting period after receiving the first CTS responsive to the normal CTS sequence being chosen by the second STA with the first CTS being of the second type; and
transmitting, by the first STA, the data to the second STA upon passage of the waiting period,
wherein the second STA comprises a non-legacy STA and the third STA comprises a legacy STA.