The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2020
Filed:
Nov. 22, 2019
Hewlett Packard Enterprise Development Lp, Houston, TX (US);
Dongho Kim, Palo Alto, CA (US);
Souvik Sen, Mountain View, CA (US);
Hewlett Packard Enterprise Development LP, Houston, TX (US);
Abstract
A method of determining the location of a mobile computing device includes measuring a first time of flight (ToF) value and a first value of received energy of direct path (EDP) (P) of a number of acknowledgement (ACK) packets received in response to a number of first probe packets sent to a first mobile device. The method calculates a preliminary distance value (d) using a ToF-based distance equation, selects an ACK packet with a distance closest to dfrom the number of ACK packets, calculates an initial path loss exponent (γ) of the selected ACK packet sample using dand P. With the access point, the method also includes measuring a second Pfor a second number of ACK packets received in response to a number of second probe packets sent to the first mobile device, calculates a supplemental distance value using an EDP-based distance equation and the γ, and determines the location of the mobile device using multilateration and the supplemental distance value.