Ingress cancellation is an advanced
physical layer
In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer; The layer most closely associated with the physical connection between devices. This layer may be implemented by a PHY chip.
The ...
technology that digitally removes in-channel ingress. If a
carrier
Carrier may refer to:
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appears in the middle of the upstream
data signal
Data transmission and data reception or, more broadly, data communication or digital communications is the transfer and reception of data in the form of a Digital data, digital bitstream or a digitized analog signal signal transmission, trans ...
, ingress cancellation can remove the interfering carrier without causing
packet loss
Packet loss occurs when one or more packets of data travelling across a computer network fail to reach their destination. Packet loss is either caused by errors in data transmission, typically across wireless networks, or network congestion.Ku ...
.
Ingress cancellation also removes one or more carriers that are higher in
amplitude
The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of am ...
than the data signal. Ingress cancellation eventually will break if the in-channel ingress gets too high.
External links
Cisco used the term when describing a product
{{Tech-stub
Digital electronics