公开(公告)号：US20150215821A1

公开(公告)日：2015-07-30

申请号：US14167749

申请日：2014-01-29

Applicant: QUALCOMM Incorporated

Inventor： Lei ZHANG ,  Sundar SUBRAMANIAN ,  Ying WANG ,  Xinzhou WU ,  Carlos ALDANA ,  Xiaoxin ZHANG

IPC: H04W28/18 ,  H04W4/02

CPC classification number: H04W4/029 ,  H04W56/00

Abstract: Implementations of the technology described herein provide adjustment to the time-of-departure (ToD) of the start of the acknowledgement frames (ACK) based on the time-of-arrival (ToA) estimation and correction of their corresponding message frames to keep the turnaround time of the acknowledgement frames stable to a predefined order of precision, with special applications for Wi-Fi ranging to achieve double-sided time-of-arrival (ToA) correction accuracy with minimal frame exchanges. A receiving station uses its time-of-arrival (ToA) correction to adjust the transmission time of an acknowledgement message (ACK) so that both the sending station and the receiving station can estimate round trip time (RTT) (or perform ranging) at the same level or higher accuracy.

Abstract translation: 本文描述的技术的实现基于到达时间（ToA）估计和相应消息帧的校正来提供对确认帧（ACK）的开始的出发时间（ToD）的调整，以保持 确认帧的周转时间以预定义的精度顺序稳定，Wi-Fi的特殊应用范围可以通过最少的帧交换实现双面到达时间（ToA）校正精度。 接收站使用其到达时间（ToA）校正来调整确认消息（ACK）的发送时间，使得发送站和接收站都可以估计出来的时间（RTT）（或执行测距）在 相同水平或更高的精度。