公开(公告)号：US20180115909A1

公开(公告)日：2018-04-26

申请号：US15802667

申请日：2017-11-03

Applicant: Cisco Technology, Inc.

Inventor： Evgeny Yankevich ,  Jack Chuang

IPC: H04W16/14 ,  H04W84/12

CPC classification number: H04W16/14 ,  H04B17/336 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  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.

公开(公告)号：US10237749B2

公开(公告)日：2019-03-19

申请号：US15802667

申请日：2017-11-03

Applicant: Cisco Technology, Inc.

Inventor： Evgeny Yankevich ,  Jack Chuang

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.

公开(公告)号：US09838882B1

公开(公告)日：2017-12-05

申请号：US15333786

申请日：2016-10-25

Applicant: Cisco Technology, Inc.

Inventor： Evgeny Yankevich ,  Jack Chuang

IPC: H04W16/12 ,  H04W16/14 ,  H04B17/336 ,  H04W84/12

CPC classification number: H04W16/14 ,  H04B17/336 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  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.