Patent ID: 11871449
Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A backoff method in a transmission process, comprising:
performing, by a sending device, listen before talk (LBT) on an unlicensed frequency band; and
sending, by the sending device, a request to send (RTS) frame to a receiving device at a time the LBT is successfully performed, wherein the RTS frame comprises a first backoff time period having a starting time no later than a time the RTS frame is listened by another device and an ending time which is configured as an expected sending time of a confirmation on clear to send (C-CTS) frame, wherein the C-CTS frame is an acknowledgement frame sent by the sending device after receiving a clear to send (CTS) frame sent by the receiving device;
receiving, by the sending device, the CTS frame sent by the receiving device; and
sending, by the sending device, the C-CTS frame to the receiving device, wherein the C-CTS frame includes a second backoff time period having a starting time no later than a time the C-CTS frame is listened by another device and an ending time which is a time a current data transmission is finished.