Invention Grant
- Patent Title: Dynamic frequency selection with discrimination
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Application No.: US15802667Application Date: 2017-11-03
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Publication No.: US10237749B2Publication Date: 2019-03-19
- Inventor: Evgeny Yankevich , Jack Chuang
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Meunier Carlin & Curfman LLC
- Main IPC: H04W16/14
- IPC: H04W16/14 ; H04B17/336 ; H04K3/00 ; H04W84/12

Abstract:
Dynamic frequency selection (DFS) is often a requirement for a wireless local area network (WLAN) apparatus to prevent the apparatus from interfering with other systems that have a priority to a radio frequency (RF) channel. When DFS is executed, the WLAN apparatus ceases WLAN operations on the channel and searches for an open channel to resume WLAN operations. Often a WLAN apparatus misinterprets signals from another system as operating on the channel when actually the received signals are signals leaked into the channel from a system transmitting on a different channel. Presented herein are methods and apparatuses for preventing unnecessary DFS operations resulting from misinterpreted signals through the use of a signal to noise ratio determined from a pulse spectral density of the received signal.
Public/Granted literature
- US20180115909A1 DYNAMIC FREQUENCY SELECTION WITH DISCRIMINATION Public/Granted day:2018-04-26
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