Invention Grant
- Patent Title: Unicast and broadcast protocol for wireless local area network ranging and direction finding
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Application No.: US15191498Application Date: 2016-06-23
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Publication No.: US10379196B2Publication Date: 2019-08-13
- Inventor: Carlos Horacio Aldana , Jeff Smith , Xiaoxin Zhang , Chia-Hui Lin , Yen-Feng Lee , Ravi Gidvani , Alecsander Eitan , Rahul Malik
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Thien T. Nguyen
- Main IPC: G01S5/00
- IPC: G01S5/00 ; H04W4/02 ; G01S5/02 ; H04W24/10 ; H04W88/02 ; H04W84/12

Abstract:
Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.
Public/Granted literature
- US20170251332A1 UNICAST AND BROADCAST PROTOCOL FOR WIRELESS LOCAL AREA NETWORK RANGING AND DIRECTION FINDING Public/Granted day:2017-08-31
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