SMOOTHING FILTER FOR IRREGULAR UPDATE INTERVALS

• US 20120190323A1
• Filed: 04/02/2012
• Published: 07/26/2012
• Est. Priority Date: 03/28/2008
• Status: Active Grant

• Current Assignee: Trapeze Networks Incorporated (Juniper Networks Incorporated)
• Original Assignee: Trapeze Networks Incorporated (Juniper Networks Incorporated)
• Inventors: Aragon, David B.
• Granted Patent: US 8,594,697 B2
• Time in Patent Office: Days
• US Class Current: 455/307
• CPC Class Codes: H04B 17/318 Received signal strength

Abstract

A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate output signal strength value can be used to identify movement of a station as well as estimate locations and direction of movement.

Claims

1. A method comprising:

filtering an irregularly received signal through a first dynamic time window at a first network portal (NP) to obtain a first received signal strength value of the irregularly received signal at a first location;

filtering the irregularly received signal through a second dynamic time window at a second NP to find a second received signal strength value of the irregularly received signal at a second location;

comparing the first received signal strength and the second received signal strength to identify a direction of movement of a source of the irregularly received signal.